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Full text of "Laptop Service Manual: IBM THINKPAD T20_ T21_ T22_ T23"

IBM Mobile Systems 
ThinkPad Computer 
Hardware Maintenance Manual 



April 2002 



This manual supports: 

ThinkPad T20, T21, T22, T23 

(MT 2647/2648) 
ThinkPad Dock (MT2631) 



- Note 

Before using this information and the product it 
supports, be sure to read the general information 
under "Notices" on page 174. 



First Edition (April 2002) 

The following paragraph does not apply to the United 
Kingdom or any country where such provisions are 
inconsistent with local law: 

INTERNATIONAL BUSINESS MACHINES CORPORATION 
PROVIDES THIS PUBLICATION "AS IS" WITHOUT ANY 
WARRANTY OF ANY KIND, EITHER EXPRESS OR 
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE 
LIMITED WARRANTIES OF MERCHANTABILITY OR 
FITNESS FOR A PARTICULAR PURPOSE. Some states 
do not allow disclaimer or express or implied warranties in 
certain transactions; therefore, this statement may not 
apply to you. 

This publication could include technical inaccuracies or 
typographical errors. Changes are periodically made to the 
information herein; these changes will be incorporated in 
new editions of the publication. IBM may make 
improvements or changes to the products or the programs 
described in this publication at any time. 

It is possible that this publication may contain references 
to, or information about, IBM products (machines and 
programs), programming, or services that are not 
announced in your country. Such references or information 
must not be construed to mean that IBM intends to 
announce such IBM products, programming, or services in 
your country. 

Requests for technical information about IBM products 
should be made to your IBM authorized dealer or your IBM 
marketing representative. 

© Copyright International Business Machines 
Corporation 2002. All rights reserved. 

US Government Users Restricted Rights - Use, duplication 
or disclosure restricted by GSAADP Schedule Contract 
with IBM Corp. 



About this manual 

This manual contains service and reference information for 
IBM ThinkPad T20, T21 , T22, T23 (MT2647, 2648), and 
ThinkPad Dock (MT2631) products. Use this manual along 
with the advanced diagnostic tests to troubleshoot 
problems. 

The manual is divided into sections as follows: 

• The common sections provide general information, 
guidelines, and safety information required in servicing 
computers. 

• The product-specific section includes service, reference, 
and product-specific parts information. 



Important 



This manual is intended for trained service 
personnel who are familiar with ThinkPad products. 
Use this manual along with the advanced diagnostic 
tests to troubleshoot problems effectively. 

Before servicing an IBM ThinkPad product, be sure 
to review the safety information under "Safety 
notices: multilingual translations" on page 3, "Safety 
information" on page 13, and "Laser compliance 
statement" on page 18. 



© Copyright IBM Corp. 2002 Mi 



iv ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Contents 

About this manual iii 

Introduction 1 

Important service information 1 

Strategy for replacing FRUs 1 

How to use error messages 2 

Diskette compatibility matrix 2 

Safety notices: multilingual translations 3 

Safety information 13 

General safety 13 

Electrical safety 14 

Safety inspection guide 15 

Handling devices that are sensitive to electorostatic 

discharge 16 

Grounding requirements 17 

Laser compliance statement 18 

General descriptions 21 

Read this first 21 

What to do first 21 

Related service information 23 

Service web site 23 

Restoring the preloaded system 23 

Passwords 26 

Power management 28 

Checkout guide 32 

Testing the computer 33 

Detecting system information with PC-Doctor. . 34 

Power system checkout 35 

ThinkPad T20, T21,T22 and T23 series 39 

Product overview 41 

Specifications 43 

Status indicators 45 

FRU Tests 47 

Fn key combinations 48 

Symptom-to-FRU index 49 

Numeric error codes 49 

Error messages 52 

Beep symptoms 53 

No-beep symptoms 53 

LCD-related symptoms 54 

Intermittent problems 55 

Undetermined problems 55 

FRU replacement notices 56 

Screw notices 56 

Retaining serial numbers 57 

Removing and replacing a FRU 59 

1010 Battery pack 60 

1 020 Backup battery 61 

© Copyright IBM Corp. 2002 v 



1 030 Hard-disk drive 63 

1040 DIMM 65 

1050 Mini PCI adapter 66 

1060 Ethernet daughter card 71 

1070 Ultrabay 2000 device 73 

1 080 Keyboard 74 

1090 Keyboard CRU insulator 82 

1100 Hinge cover 83 

1110 Keyboard bezel 88 

1120 Fan assembly 94 

1130 CPU 98 

1140 PC Card slot assembly 100 

1150 Speaker 103 

1160 Hard-disk bay 105 

1170 Ultrabay 2000 slot 107 

1180 System board 113 

1190 Secure chip 117 

1200 Microphone cable 118 

2010 LCD assembly 121 

2020 Front bezel 122 

2030 Inverter card 123 

2040 LCD panel 125 

2050 Antenna assembly 128 

2060 Sub card 131 

3010 ThinkPad Dock PCI cover 133 

3020 ThinkPad Dock top cover 136 

Locations 140 

Front view 140 

Rear view 141 

Bottom view 142 

Parts list 143 

T20, T21 , T22 and T23 series model matrix 146 

Overall 147 

AC adapters 1 56 

LCD FRUs 157 

Keyboard 160 

Recovery CDs 161 

Miscellaneous parts 170 

Optional FRUs 171 

Common parts list 172 

Notices 174 

Trademarks 174 



vi ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Introduction 



Important service information 



Important 



BIOS and device driver fixes are 
customer-installable. The BIOS and device drivers 
are posted on the IBM support site 

http: //www. i bm. com/pc/support 

Advise customers to contact the PC Company 
HelpCenter at 800-772-2227 if they need assistance 
in obtaining or installing any diskette fixes. 

Customers in Canada should call IBM HelpPC at 
800-565-3344 for assistance or download 
information. 



Strategy for replacing FRUs 



Before replacing parts 



Make sure that all diskette fixes are installed before 
replacing any FRUs listed in this manual. 



Use the following strategy to prevent unnecessary expense 
for replacing and servicing FRUs: 

• If you are instructed to replace a FRU but the 
replacement does not correct the problem, reinstall 
the original FRU before you continue. 

• Some computers have both a processor board and a 
system board. If you are instructed to replace either the 
processor board or the system board, and replacing one 
of them does not correct the problem, reinstall that 
board, and then replace the other one. 

• If an adapter or device consists of more than one FRU, 
any of the FRUs may be the cause of the error. Before 
replacing the adapter or device, remove the FRUs, one 
by one, to see if the symptoms change. Replace only 
the FRU that changed the symptoms. 

Attention: The setup configuration on the computer you 
are servicing may have been customized. Running 
Automatic Configuration may alter the settings. Note the 
current configuration settings (using the View Configuration 
option); then, when service has been completed, verify that 
those settings remain in effect. 



© Copyright IBM Corp. 2002 



Important service information 

Strategy for replacing a hard-disk drive 

Always try to run a low-level format before replacing a 
hard-disk drive. 

Attention: The drive startup sequence in the computer 
you are servicing may have been changed. Be extremely 
careful during write operations such as copying, saving, or 
formatting. If you select an incorrect drive, data or 
programs can be overwritten. 

How to use error messages 

Use the error codes displayed on the screen to diagnose 
failures. If more than one error code is displayed, begin the 
diagnosis with the first error code. Whatever causes the 
first error code may also cause false error codes. If no 
error code is displayed, see if the error symptom is listed 
in the Symptom-to-FRU Index for the computer you are 
servicing. 

Diskette compatibility matrix 

The compatibility of each of the drives with the diskettes 
for it is as follows: 



Diskette 
drive 


Diskette 
capacity 


Compatibility 


3.5-inch 


1.0 MB 


Read and write 




2.0 MB 


Read and write 




4.0 MB 


Not compatible 



ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety notices 



Safety notices: multilingual translations 

In this manual, safety notices appear in English with a 
page number reference to the appropriate multilingual, 
translated safety notice found in this section. 

The following safety notices are provided in English, 
French, German, Italian, and Spanish. 

Safety notice 1 



Before the computer is powered-on after FRU 
replacement, make sure all screws, springs, and other 
small parts are in place and are not left loose inside 
the computer. Verify this by shaking the computer and 
listening for rattling sounds. Metallic parts or metal 
flakes can cause electrical shorts. 

Avant de remettre I'ordinateur sous tension apres 
remplacement d'une unite en clientele, verifiez que 
tous les ressorts, vis et autres pieces sont bien en 
place et bien fixees. Pour ce faire, secouez I'unite et 
assurez-vous qu'aucun bruit suspect ne se produit. Des 
pieces metalliques ou des copeaux de metal pourraient 
causer un court-circuit. 

Bevor nach einem FRU-Austausch der Computer 
wieder angeschlossen wird, muG sichergestellt werden, 
daB keine Schrauben, Federn oder andere Kleinteile 
fehlen oder im Gehause vergessen wurden. Der 
Computer mu3 geschuttelt und auf Klappergerausche 
gepruft werden. Metallteile oder-splitter konnen 
Kurzschliisse erzeugen. 

Prima di accendere I'elaboratore dopo che e stata 
effettuata la sostituzione di una FRU, accertarsi che 
tutte le viti, le molle e tutte le altri parti di piccole 
dimensioni siano nella corretta posizione e non siano 
sparse all'intemo dell'elaboratore. Verificare cio 
scuotendo I'elaboratore e prestando attenzione ad 
eventuali rumori; eventuali parti o pezzetti metallici 
possono provocare cortocircuiti pericolosi. 

Antes de encender el sistema despues de sustituir una 
FRU, compruebe que todos los tornillos, muelles y 
demas piezas pequenas se encuentran en su sitio y no 
se encuentran sueltas dentro del sistema. 
Compruebelo agitando el sistema y escuchando los 
posibles ruidos que provocarian. Las piezas metalicas 
pueden causar cortocircuitos electricos. 



Introduction 3 



Safety notices 
Safety notice 2 

A DANGER 



Some standby batteries contain a small amount of 
nickel and cadmium. Do not disassemble a standby 
battery, recharge it, throw it into fire or water, or 
short-circuit it. Dispose of the battery as required 
by local ordinances or regulations. Use only the 
battery in the appropriate parts listing. Use of an 
incorrect battery can result in ignition or explosion 
of the battery. 

Certaines batteries de secours contiennent du 
nickel et du cadmium. Ne les demontez pas, ne les 
rechargez pas, ne les exposez ni au feu ni a I'eau. 
Ne les mettez pas en court-circuit. Pour les mettre 
au rebut, conformez-vous a la reglementation en 
vigueur. Lorsque vous remplacez la pile de 
sauvegarde ou celle de I'horloge temps reel, veillez 
a n'utiliser que les modeles cites dans la liste de 
pieces detachees adequate. Une batterie ou une 
pile inappropriee risque de prendre feu ou 
d'exploser. 

Die Bereitschaftsbatterie, die sich unter dem 
Diskettenlaufwerk befindet, kann geringe Mengen 
Nickel und Cadmium enthalten. Sie darf nur durch 
die Verkaufsstelle Oder den IBM Kundendienst 
ausgetauscht werden. Sie darf nicht zerlegt, 
wiederaufgeladen, kurzgeschlossen, oder Feuer 
oder Wasser ausgesetzt werden. Die Batterie kann 
schwere Verbrennungen oder Veratzungen 
verursachen. Bei der Entsorgung die ortlichen 
Bestimmungen fur Sondermull beachten. Beim 
Ersetzen der Bereitschafts-oder Systembatterie nur 
Batterien des Typs verwenden, der in der 
Ersatzteilliste aufgefiihrt ist. Der Einsatz falscher 
Batterien kann zu Entzundung oder Explosion 
fiihren. 

(continued) 



ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety notices 



(continuation of safety notice 2) 

Alcune batterie di riserva contengono una piccola 
quantita di nichel e cadmio. Non smontarle, 
ricaricarle, gettarle nel fuoco o nell'acqua ne 
cortocircuitarle. Smaltirle secondo la normativa in 
vigore (DPR 915/82, successive disposizioni e 
disposizioni locali). Quando si sostituisce la 
batteria dell'RTC (real time clock) o la batteria di 
supporto, utilizzare soltanto i tipi inseriti 
nell'appropriato Catalogo parti. L'impiego di una 
batteria non adatta potrebbe determinare I'incendio 
o I'esplosione della batteria stessa. 

Algunas baterias de reserva contienen una 
pequena cantidad de niquel y cadmio. No las 
desmonte, ni recargue, ni las eche al fuego o al 
agua ni las cortocircuite. Desechelas tal como 
dispone la normativa local. Utilice solo baterias que 
se encuentren en la lista de piezas. La utilizacion 
de una bateria no apropiada puede provocar la 
ignicion o explosion de la misma. 



Introduction 5 



Safety notices 
Safety notice 3 

A DANGER 



The battery pack contains small amounts of nickel. 
Do not disassemble it, throw it into fire or water, or 
short-circuit it. Dispose of the battery pack as 
required by local ordinances or regulations. Use 
only the battery in the appropriate parts listing 
when replacing the battery pack. Use of an 
incorrect battery can result in ignition or explosion 
of the battery. 

La batterie contient du nickel. Ne la demontez pas, 
ne I'exposez ni au feu ni a I'eau. Ne la mettez pas 
en court-circuit. Pour la mettre au rebut, 
conformez-vous a la reglementation en vigueur. 
Lorsque vous remplacez la batterie, veillez a 
n'utiliser que les modeles cites dans la liste de 
pieces detachees adequate. En effet, une batterie 
inappropriee risque de prendre feu ou d'exploser. 

Akkus enthalten geringe Mengen von Nickel. Sie 
diirfen nicht zerlegt, wiederaufgeladen, 
kurzgeschlossen, oder Feuer oder Wasser 
ausgesetzt werden. Bei der Entsorgung die 
ortlichen Bestimmungen fur Sondermull beachten. 
Beim Ersetzen der Batterie nur Batterien des Typs 
verwenden, der in der Ersatzteilliste aufgefiihrt ist. 
Der Einsatz falscher Batterien kann zu Entziindung 
oder Explosion fiihren. 

La batteria contiene piccole quantita di nichel. Non 
smontarla, gettarla nel fuoco o nell'acqua ne 
cortocircuitarla. Smaltirla secondo la normativa in 
vigore (DPR 915/82, successive disposizioni e 
disposizioni locali). Quando si sostituisce la 
batteria, utilizzare soltanto i tipi inseriti 
nell'appropriato Catalogo parti. L'impiego di una 
batteria non adatta potrebbe determinare I'incendio 
o I'esplosione della batteria stessa. 

(continued) 



6 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety notices 



(continuation of safety notice 3) 

Las baterias contienen pequenas cantidades de 
ni'quol. No las desmonte, ni recargue, ni las eche al 
fuego o al agua ni las cortocircuite. Desechelas tal 
como dispone la normativa local. Utilice solo 
baterias que se encuentren en la lista de piezas al 
sustituir la bateria. La utilizacion de una bateria no 
apropiada puede provocar la ignicion o explosion 
de la misma. 



Safety notice 4 
A DANGER 



The lithium battery can cause a fire, an explosion, 
or a severe burn. Do not recharge it, remove its 
polarized connector, disassemble it, heat it above 
100°C (212°F), incinerate it, or expose its cell 
contents to water. Dispose of the battery as 
required by local ordinances or regulations. Use 
only the battery in the appropriate parts listing. Use 
of an incorrect battery can result in ignition or 
explosion of the battery. 

La pile de sauvegarde contient du lithium. Elle 
presente des risques d'incendie, d'explosion ou de 
brulures graves. Ne la rechargez pas, ne retirez pas 
son connecteur polarise et ne la demontez pas. Ne 
I'exposez pas a une temperature superieure a 
100°C, ne la faites pas bruler et n'en exposez pas 
le contenu a I'eau. Mettez la pile au rebut 
conformement a la reglementation en vigueur. Une 
pile inappropriee risque de prendre feu ou 
d'exploser. 

(continued) 



Introduction 



Safety notices 



(continuation of safety notice 4) 

Die Systembatterie ist eine Lithiumbatterie. Sie 
kann sich cntziindon, explodieren Oder schwere 
Verbrennungen hervorrufen. Batterien dieses Typs 
diirfen nicht aufgeladen, zerlegt, iiber 100 C erhitzt 
Oder verbrannt werden. Auch darf ihr Inhalt nicht 
mit Wasser in Verbindung gebracht Oder der zur 
richtigen Polung angebrachte Verbindungsstecker 
entfernt werden. Bei der Entsorgung die ortlichen 
Bestimmungen fur Sondermiill beachten. Beim 
Ersetzen der Batterie nur Batterien des Typs 
verwenden, der in der Ersatzteilliste aufgefiihrt ist. 
Der Einsatz falscher Batterien kann zu Entziindung 
Oder Explosion fiihren. 

La batteria di supporto e una batteria al litio e puo 
incendiarsi, esplodere o procurare gravi ustioni. 
Evitare di ricaricarla, smontarne il connettore 
polarizzato, smontarla, riscaldarla ad una 
temperatura superiore ai 100 gradi centigradi, 
incendiarla o gettarla in acqua. Smaltirla secondo 
la normativa in vigore (DPR 915/82, successive 
disposizioni e disposizioni locali). L'impiego di una 
batteria non adatta potrebbe determinare I'incendio 
o I'esplosione della batteria stessa. 

La bateria de repuesto es una bateria de litio y 
puede provocar incendios, explosiones o 
quemaduras graves. No la recargue, ni quite el 
conector polarizado, ni la desmonte, ni caliente por 
encima de los 100°C (212°F), ni la incinere ni 
exponga el contenido de sus celdas al agua. 
Desechela tal como dispone la normativa local. 



8 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety notices 
Safety notice 5 



If the LCD breaks and the fluid from inside the LCD 
gets into your eyes or on your hands, immediately 
wash the affected areas with water for at least 1 5 
minutes. Seek medical care if any symptoms from the 
fluid are present after washing. 

Si le panneau d'affichage a cristaux liquides se brise et 
que vous recevez dans les yeux ou sur les mains une 
partie du fluide, hncez-les abondamment pendant au 
moins quinze minutes. Consultez un medecin si des 
symptomes persistent apres le lavage. 

Die Leuchtstoffrohre im LCD-Bildschirm enthalt 
Quecksilber. Bei der Entsorgung die ortlichen 
Bestimmungen fur Sondermull beachten. Der 
LCD-Bildschirm besteht aus Glas und kann zerbrechen, 
wenn er unsachgemaB behandelt wird Oder der 
Computer auf den Boden fallt. Wenn der Bildschirm 
beschadigt ist und die darin befindliche Flussigkeit in 
Kontakt mit Haut und Augen gerat, sollten die 
betroffenen Stellen mindestens 15 Minuten mit Wasser 
abgespult und bei Beschwerden anschlieBend ein Arzt 
aufgesucht werden. 

Nel caso che caso I'LCD si dovesse rompere ed il 
liquido in esso contenuto entrasse in contatto con gli 
occhi o le mani, lavare immediatamente le parti 
interessate con acqua corrente per almeno 15 minuti; 
poi consultare un medico se i sintomi dovessero 
permanere. 

Si la LCD se rompe y el fluido de su interior entra en 
contacto con sus ojos o sus manos, lave 
inmediatamente las areas afectadas con agua durante 
15 minutos como minimo. Obtenga atencion medica si 
se presenta algun sintoma del fluido despues de 
lavarse. 



Introduction 9 



Safety notices 
Safety notice 6 

A DANGER 



To avoid shock, do not remove the plastic cover 
that protects the lower part of the inverter card. 

Afin d'eviter tout risque de choc electrique, ne 
retirez pas le cache en plastique protegeant la 
partie inferieure de la carte d'alimentation. 

Aus Sicherheitsgriinden die Kunststoffabdeckung, 
die den unteren Teil der Spannungswandlerplatine 
umgibt, nicht entfernen. 

Per evitare scosse elettriche, non rimuovere la 
copertura in plastica che avvolge la parte inferiore 
della scheda invertitore. 

Para evitar descargas, no quite la cubierta de 
plastico que rodea la parte baja de la tarjeta 
invertida. 



1 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety notices 
Safety notice 7 

A DANGER 



Though the main batteries have low voltage, a 
shorted or grounded battery can produce enough 
current to burn personnel or combustible materials. 

Bien que le voltage des batteries principales soit 
peu eleve, le court-circuit ou la mise a la masse 
d'une batterie peut produire suffisamment de 
courant pour bruler des materiaux combustibles ou 
causer des brulures corporelles graves. 

Obwohl Hauptbatterien eine niedrige Spannung 
haben, konnen sie doch bei KurzschluB Oder 
Erdung genug Strom abgeben, urn brennbare 
Materialien zu entziinden oder Verletzungen bei 
Personen hervorzurufen. 

Sebbene le batterie di alimentazione siano a basso 
voltaggio, una batteria in corto circuito o a massa 
pud fornire corrente sufficiente da bruciare 
materiali combustibili o provocare ustioni ai tecnici 
di manutenzione. 

Aunque las baterias principales tienen un voltaje 
bajo, una bateria cortocircuitada o con contacto a 
tierra puede producir la corriente suficiente como 
para quemar material combustible o provocar 
quemaduras en el personal. 



Introduction 11 



Safety notices 
Safety notice 8 

A DANGER 



Before removing any FRU, power off the computer, 
unplug all power cords from electrical outlets, 
remove the battery pack, and then disconnect any 
interconnecting cables. 

Avant de retirer une unite remplacable en clientele, 
mettez le systeme hors tension, debranchez tous 
les cordons d'alimentation des socles de prise de 
courant, retirez la batterie et deconnectez tous les 
cordons d'interface. 

Die Stromzufuhr muB abgeschaltet, alio Stromkabel 
aus der Steckdose gezogen, der Akku entfernt und 
alio Verbindungskabel abgenommen sein, bevor 
eine FRU entfernt wird. 

Prima di rimuovere qualsiasi FRU, spegnere il 
sistema, scollegare dalle prese elettriche tutti i cavi 
di alimentazione, rimuovere la batteria e poi 
scollegare i cavi di interconnessione. 

Antes de quitar una FRU, apague el sistema, 
desenchufe todos los cables de las tomas de 
corriente electrica, quite la bateria y, a 
continuacion, desconecte cualquier cable de 
conexion entre dispositivos. 



1 2 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety information 



Safety information 

The following section presents the safety information that 
you need to be familiar with before servicing an IBM 
mobile computer. 

General safety 

Follow these rules to ensure general safety: 

• Observe good housekeeping in the area of the 
machines during and after maintenance. 

• When lifting any heavy object: 

1 . Ensure you can stand safely without slipping. 

2. Distribute the weight of the object equally between 
your feet. 

3. Use a slow lifting force. Never move suddenly or 
twist when you attempt to lift. 

4. Lift by standing or by pushing up with your leg 
muscles; this action removes the strain from the 
muscles in your back. Do not attempt to lift any 
object that weighs more than 16 kg (35 lb) or objects 
that you think are too heavy for you. 

• Do not perform any action that causes hazards to the 
customer, or that makes the equipment unsafe. 

• Before you start the machine, ensure that other service 
representatives and the customer's personnel are not in 
a hazardous position. 

• Place removed covers and other parts in a safe place, 
away from all personnel, while you are servicing the 
machine. 

• Keep your toolcase away from walk areas so that other 
people will not trip over it. 

• Do not wear loose clothing that can be trapped in the 
moving parts of a machine. Make sure that your sleeves 
are fastened or rolled up above your elbows. If your hair 
is long, fasten it. 

• Insert the ends of your necktie or scarf inside clothing or 
fasten it with a nonconductive clip, approximately 8 
centimeters (3 inches) from the end. 

• Do not wear jewelry, chains, metal-frame eyeglasses, or 
metal fasteners for your clothing. 

Attention: Metal objects are good electrical 
conductors. 

• Wear safety glasses when you are hammering, drilling, 
soldering, cutting wire, attaching springs, using solvents, 
or working in any other conditions that might be 
hazardous to your eyes. 



Introduction 13 



Safety information 

• After service, reinstall all safety shields, guards, labels, 
and ground wires. Replace any safety device that is 
worn or defective. 

• Reinstall all covers correctly before returning the 
machine to the customer. 

Electrical safety 

Observe the following rules when working on electrical 
equipment. 



" Important 

Use only approved tools and test equipment. Some 
hand tools have handles covered with a soft 
material that does not insulate you when working 
with live electrical currents. 

Many customers have, near their equipment, rubber 
floor mats that contain small conductive fibers to 
decrease electrostatic discharges. Do not use this 
type of mat to protect yourself from electrical shock. 



Find the room emergency power-off (EPO) switch, 
disconnecting switch, or electrical outlet. If an electrical 
accident occurs, you can then operate the switch or 
unplug the power cord quickly. 

Do not work alone under hazardous conditions or near 
equipment that has hazardous voltages. 

Disconnect all power before: 

- Performing a mechanical inspection 

- Working near power supplies 

- Removing or installing main units 

Before you start to work on the machine, unplug the 
power cord. If you cannot unplug it, ask the customer to 
power-off the wall box that supplies power to the 
machine and to lock the wall box in the off position. 

If you need to work on a machine that has exposed 
electrical circuits, observe the following precautions: 

- Ensure that another person, familiar with the 
power-off controls, is near you. 

Attention: Another person must be there to switch 
off the power, if necessary. 

- Use only one hand when working with powered-on 
electrical equipment; keep the other hand in your 
pocket or behind your back. 

Attention: An electrical shock can occur only when 
there is a complete circuit. By observing the above 
rule, you may prevent a current from passing through 
your body. 



1 4 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety information 

- When using testers, set the controls correctly and 
use the approved probe leads and accessories for 
that tester. 

- Stand on suitable rubber mats (obtained locally, if 
necessary) to insulate you from grounds such as 
metal floor strips and machine frames. 

Observe the special safety precautions when you work 
with very high voltages; these instructions are in the 
safety sections of maintenance information. Use 
extreme care when measuring high voltages. 

• Regularly inspect and maintain your electrical hand tools 
for safe operational condition. 

• Do not use worn or broken tools and testers. 

• Never assume that power has been disconnected from 
a circuit. First, check that it has been powered off. 

• Always look carefully for possible hazards in your work 
area. Examples of these hazards are moist floors, 
nongrounded power extension cables, power surges, 
and missing safety grounds. 

• Do not touch live electrical circuits with the reflective 
surface of a plastic dental mirror. The surface is 
conductive; such touching can cause personal injury and 
machine damage. 

• Do not service the following parts with the power on 
when they are removed from their normal operating 
places in a machine: 

- Power supply units 

- Pumps 

- Blowers and fans 

- Motor generators 

and similar units. (This practice ensures correct 
grounding of the units.) 

• If an electrical accident occurs: 

- Use caution; do not become a victim yourself. 

- Switch off power. 

- Send another person to get medical aid. 

Safety inspection guide 

The purpose of this inspection guide is to assist you in 
identifying potentially unsafe conditions. As each machine 
was designed and built, required safety items were 
installed to protect users and service personnel from injury. 
This guide addresses only those items. You should use 
good judgment to identify potential safety hazards due to 
attachment of non-IBM features or options not covered by 
this inspection guide. 



Introduction 15 



Safety information 

If any unsafe conditions are present, you must determine 
how serious the apparent hazard could be and whether 
you can continue without first correcting the problem. 

Consider these conditions and the safety hazards they 
present: 

• Electrical hazards, especially primary power (primary 
voltage on the frame can cause serious or fatal 
electrical shock) 

• Explosive hazards, such as a damaged CRT face or a 
bulging capacitor 

• Mechanical hazards, such as loose or missing hardware 

To determine whether there are any potentially unsafe 
conditions, use the following checklist at the beginning of 
every service task. Begin the checks with the power off, 
and the power cord disconnected. 

Checklist: 

1 . Check exterior covers for damage (loose, broken, or 
sharp edges). 

2. Power-off the computer. Disconnect the power cord. 

3. Check the power cord for: 

a. A third-wire ground connector in good condition. 
Use a meter to measure third-wire ground 
continuity for 0.1 ohm or less between the external 
ground pin and frame ground. 

b. The power cord should be the type specified in the 
parts list. 

c. Insulation must not be frayed or worn. 

4. Remove the cover. 

5. Check for any obvious non-IBM alterations. Use good 
judgment as to the safety of any non-IBM alterations. 

6. Check inside the unit for any obvious unsafe 
conditions, such as metal filings, contamination, water 
or other liquids, or signs of fire or smoke damage. 

7. Check for worn, frayed, or pinched cables. 

8. Check that the power-supply cover fasteners (screws 
or rivets) have not been removed or tampered with. 

Handling devices that are sensitive to 
electorostatic discharge 

Any computer part containing transistors or integrated 
circuits (ICs) should be considered sensitive to electrostatic 
discharge (ESD.) ESD damage can occur when there is a 
difference in charge between objects. Protect against ESD 



1 6 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Safety information 
damage by equalizing the charge so that the machine, the 
part, the work mat, and the person handling the part are all 
at the same charge. 



Notes 



1. Use product-specific ESD procedures when they 
exceed the requirements noted here. 

2. Make sure that the ESD protective devices you 
use have been certified (ISO 9000) as fully 
effective. 



When handling ESD-sensitive parts: 

• Keep the parts in protective packages until they are 
inserted into the product. 

• Avoid contact with other people. 

• Wear a grounded wrist strap against your skin to 
eliminate static on your body. 

• Prevent the part from touching your clothing. Most 
clothing is insulative and retains a charge even when 
you are wearing a wrist strap. 

• Use the black side of a grounded work mat to provide a 
static-free work surface. The mat is especially useful 
when handling ESD-sensitive devices. 

• Select a grounding system, such as those listed below, 
to provide protection that meets the specific service 
requirement. 



Note 



The use of a grounding system is desirable but 
not required to protect against ESD damage. 



- Attach the ESD ground clip to any frame ground, 
ground braid, or green-wire ground. 

- Use an ESD common ground or reference point 
when working on a double-insulated or 
battery-operated system. You can use coax or 
connector-outside shells on these systems. 

- Use the round ground-prong of the AC plug on 
AC-operated computers. 

Grounding requirements 

Electrical grounding of the computer is required for 
operator safety and correct system function. Proper 
grounding of the electrical outlet can be verified by a 
certified electrician. 



Introduction 17 



Laser compliance statement 



Laser compliance statement 

Some IBM Personal Computer models are equipped from 
the factory with an optical storage device such as a 
CD-ROM drive or a DVD-ROM drive. They are also sold 
separately as options. The drive is certified in the U.S. to 
conform to the requirements of the Department of Health 
and Human Services 21 Code of Federal Regulations 
(DHHS 21 CFR) Subchapter J for Class 1 laser products. 
Elsewhere, the drive is certified to conform to the 
requirements of the International Electrotechnical 
Commission (IEC) 825 and CENELEC EN 60 825 for 
Class 1 laser products. 



1 8 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Laser compliance statement 
When a CD-ROM drive, DVD drive or the other laser 
product is installed, note the following: 



A CAUTION: 



Use of controls or adjustments or performance of 
procedures other than those specified herein might 
result in hazardous radiation exposure. 

O uso de controles, ajustes ou desempenho de 
procedimentos diferentes daqueles aqui 
especificados pode resultar em perigosa exposicao 
a radiacao. 

Pour eviter tout risque d'exposition au rayon laser, 
respectez les consignes de reglage et d'utilisation 
des commandes, ainsi que les procedures decrites. 

Werden Steuer- und Einstellelemente anders als 
hier festgesetzt verwendet, kann gefahrliche 
Laserstrahlung auftreten. 

Az itt eloi'rt eljarasoktol, bealli'tasoktol es vezerlesektol 
elterni a lezersugarzas veszelye miatt kockazatos I 

L'utilizzo di controlli, regolazioni o I'esecuzione di 
procedure diverse da quelle specificate possono 
provocare I'esposizione a. 

Mcnanb30BaHwe a/ieMemoB HacTpoMKM m 
Bbino^HeHne npoueflyp mhwx, neM yKa3aH0 
3flecb, MoxeT npuBecTM k onacHOMy 
paflnau,M0HH0My o6jiyHeHMto. 

Pouzitie kontrol, uprav alebo inych vykonani'od inych 
vyrobcov, ako je v tomto specifikovane, mohlo by mat' 
za nasledok nebezpecenstvo vystavenia sa vyziarovaniu. 

El uso de controles o ajustes o la ejecucion de 
procedimientos distintos de los aqui especificados 
puede provocar la exposicion a radiaciones 
peligrosas. 



Opening the CD-ROM drive, DVD-ROM drive or the other 
optical storage device could result in exposure to 
hazardous laser radiation. There are no serviceable parts 
inside those drives. Do not open. 



Introduction 19 



Laser compliance statement 

Some CD-ROM drives, DVD-ROM drives, or other optical 
storage devices contain an embedded Class 3A or Class 
3B laser diode. Note the following: 



A DANGER 



Emits visible and invisible laser radiation when 
open. Do not stare into the beam, do not view 
directly with optical instruments, and avoid direct 
exposure to the beam. 

Radiacao por raio laser ao abrir. Nao olhe fixo no 
feixe de luz, nao olhe diretamente por meio de 
instrumontos oticos e evite exposicao direta com o 
feixe de luz. 

Rayonnement laser si carter ouvert. Evitez de fixer 
le faisceau, de le regarder directement avec des 
instruments optiques, ou de vous exposer au 
rayon. 

Laserstrahlung bei geoffnetem Gerat. Nicht direkt 
Oder Liber optische Instrumente in den Laserstrahl 
sehen und den Strahlungsbereich meiden. 

Kinyitaskor lezersugar ! Ne nezzen bele se szabad 
szemmel, se optikai eszkozokkel. Keriilje a 
sugarnyalabbal valo erintkezest !. 

Aprendo I'unita vengono emesse radiazioni laser. 
Non fissare il fascio, non guardarlo direttamente 
con strumenti ottici e evitare I'esposizione diretta al 
fascio. 

OTKpbiBaa, 6epernTecb jia3epHoro M3/iyHeHnsi. 
He CMOTpme Ha ziyn, He pa3nrmAbiBaMTe ero 

C nOMOLUbK) OnTMHeCKMX MHCTpyMeHTOB, a TaioKe 

M36eraMTe npsiMoro B03fleMCTBM5i /ia3epHoro jiyHa. 

Ked' je laserova jednotka otvorena. Vyhnite sa priamemu 
pohl'adu a nehl'adte priamo s optickymi nastrojmi do liica 
a vyhnite sa priamemu vystaveniu I'ucov. 

Radiacion laser al abrir. No mire fijamente ni 
examine con instrumental optico el haz de luz. 
Evite la exposicion directa al haz. 



20 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



General descriptions 



This chapter includes descriptions for any ThinkPad model 
that has the PC-Doctor DOS diagnostics program. Some 
descriptions might not apply to your particular computer. 

Read this first 

Before you go to the checkout guide, be sure to read this 
section. 



Important notes 



Only certified trained personnel should 
service the computer. 

Read the entire FRU removal and replacement 
page before replacing any FRU. 

Use new nylon-coated screws when you 
replace FRUs. 

Be extremely careful during such write 
operations as copying, saving, or formatting. 

Drives in the computer that you are servicing 
sequence might have been altered. If you select 
an incorrect drive, data or programs might be 
overwritten. 

Replace FRUs only for the correct model. 

When you replace a FRU, make sure the model 
of the machine and the FRU part number are 
correct by referring to the FRU parts list. 

A FRU should not be replaced because of a 
single, unreproducible failure. Single failures 
can occur for a variety of reasons that have 
nothing to do with a hardware defect, such as 
cosmic radiation, electrostatic discharge, or 
software errors. Consider replacing a FRU only 
when a problem recurs. If you suspect that a 
FRU is defective, clear the error log and run the 
test again. If the error does not recur, do not 
replace the FRU. 

Be careful not to replace a nondefective FRU. 



What to do first 

When you do return a FRU, you must include the following 
information in the parts exchange form or parts return form 
that you attach to it: 

1 . Name and phone number of servicer 

2. Date of service 

3. Date on which the machine failed 



© Copyright IBM Corp. 2002 21 



Read this first 

4. Date of purchase 

5. Failure symptoms, error codes appearing on the 

display, and beep symptoms 
6. Procedure index and page number in which the 

failing FRU was detected 

7. Failing FRU name and part number 

8. Machine type, model number, and serial number 

9. Customer's name and address 

Note for warranty: 

During the warranty period, the customer may be 
responsible for repair costs if the computer damage was 
caused by misuse, accident, modification, unsuitable 
physical or operating environment, or improper 
maintenance by the customer. The following list provides 
some common items that are not covered under warranty 
and some symptoms that might indicate that the system 
was subjected to stress beyond normal use. 

Before checking problems with the computer, determine 
whether the damage is covered under the warranty by 
referring to the following: 

The following are not covered under warranty: 

• LCD panel cracked from the application of excessive 
force or from being dropped 

• Scratched (cosmetic) parts 

• Distortion, deformation, or discoloration of the cosmetic 
parts 

• Cracked or broken plastic parts, broken latches, broken 
pins, or broken connectors caused by excessive force 

• Damage caused by liquid spilled into the system 

• Damage caused by the improper insertion of a PC Card 
or the installation of an incompatible card 

• Damage caused by foreign material in the diskette drive 

• Diskette drive damage caused by pressure on the 
diskette drive cover or by the insertion of a diskette with 
multiple labels 

• Damaged or bent diskette eject button 

• Fuses blown by attachment of a nonsupported device 

• Forgotten computer password (making the computer 
unusable) 

• Sticky keys caused by spilling a liquid onto the keyboard 

The following symptoms might indicate damage 
caused by nonwarranted activities: 

• Missing parts might be a symptom of unauthorized 
service or modification. 

• If the spindle of a hard-disk drive becomes noisy, it may 
have been subjected to excessive force, or dropped. 



22 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Related service information 



Related service information 

This section provides information about the following: 

• "Service web site" 

• "Restoring the preloaded system" 

• "Passwords" on page 26 

• "Power management" on page 28 

Service web site 

When the latest maintenance diskette and the system 
program service diskette become available, a notice will be 
posted on http://www.ibm.com/pc/partner/infotips 

Restoring the preloaded system 

If the data on a hard-disk drive is damaged or accidentally 
erased, you can restore the software that was shipped with 
the computer. This software includes the pre-installed 
operating system, applications, and device drivers. 

To restore the pre-installed software, you can use either 
the Product Recovery program or a recovery CD. 



~ Ordering the recovery CD 

When the hard-disk drive is replaced because of a 
failure, no Product Recovery program is on the new 
hard disk. In this case, you must use the Product 
Recovery CD for the computer. Order the recovery 
CD and the hard-disk drive at the same time so that 
you can recover the new hard-disk drive with the 
pre-installed software when they arrive. For 
information on which CD to order, see "Recovery 
CDs" on page 161 



The Product Recovery program is in the service partition, a 
section of the hard-disk drive that is not displayed by 
Windows Explorer. 

Attention: All of the files on the primary hard-disk 
partition (usually drive C) will be lost in the recovery 
process. Be sure to back up copies of the files you have 
saved on your drive C before you begin. 

Creating a Recovery Repair diskette 

If the operating system cannot boot normally, or if you 
cannot get access to the Product Recovery program, you 
can use the Recovery Repair diskette to boot the 
computer. Make a Recovery Repair diskette and save it for 
future use. To make a Recovery Repair diskette, do the 
following: 

1 . Shut down and restart the computer. 

General descriptions 23 



Related service information 

2. At the prompt, press F11. (The option to press F11 
appears for only a few seconds. You must press F11 
quickly.) The Product Recovery program main menu 
opens. 

Note: If you are prompted to select the operating 
system, select one you want to recover. Then 
the Product Recovery program main menu 
opens. 

3. Select System Utilities from the main menu. Press 
Enter. 

4. Select Create a Recovery Repair diskette. Press 
Enter. 

5. Follow the on-screen instructions. 

6. When the process is completed, label the diskette 
"Recovery Repair diskette" and save it for future use. 

Product Recovery program 

Note: The recovery process might take up to 2 hours. 

To use the Product Recovery program to restore the 
pre-installed software, do the following: 

1 . Save all files and shut down the desktop. 

2. Turn off the computer. 

3. Turn on the computer. If you are using Windows XP, 
three messages (F1, F11, and F12) appear on the 
screen for a few seconds. One of them is "Press F11 
to invoke the IBM Product Recovery program". 

While the message is displayed, quickly press F11. 

If you are using Windows 2000 or another operating 
system, the startup screen is displayed first, and then 
the message "To start the Product Recovery 
program, press F11" at the top of the screen. Here 
again it appears very briefly; watch for it, and press 
F11 before it disappears. 

Note: If this message is not displayed, you can use a 
Recovery Repair diskette to get access to the 
Product Recovery program. (For using a 
Recovery Repair diskette, see "To use the 
Recovery Repair diskette:" on page 26.) 

4. From the list displayed on the screen, select the 
operating system you want to recover. 

5. Select the recovery options you want, and follow the 
instructions on the screen. 

6. When the Product Recovery program finishes running, 
the computer will restart with the pre-installed operating 
system, drivers, and software. 



24 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Related service information 
Note: Network drivers are not automatically restored 
with Windows NT 4.0; you will need to reinstall 

them. 

Note: If you use Windows 2000 or Windows 98, 

restart the system by pressing Ctrl+Alt+Del or 
by turning the computer off and then on again. 
The computer will restart with the pre-installed 
operating system, drivers, and software. 

Using the recovery CD 

To create the service partition and install the preloaded 
system from the recovery CD, do the following: 

To create the service partition: 

1. Erase all partitions on the hard-disk drive, using FDISK 
or a similar application. 

2. Boot with the recovery CD (and the boot diskette if 
required.) 

3. Following message is displayed: "Your computer 
originally included a Product Recovery program ... 
Reinstall the Product Recovery program? (Y/N) [ ]". 

Note: If the hard-disk drive contains any partitions, you 
do not receive this message; go to step 1 . 

4. Press Y key. The service partition is created and 
loaded with the Product Recovery program files. 

Note: If you do not want to create the service partition, 
press N key, and then go to step 8. 

5. At next window, press Enter to continue. 

• The service partition is created. The system 
automatically reboots during this process. 

• The recovery process copies some files to the 
service partition, and PKUNZIPs others. 

• Follow the prompts. You may be prompted to 
change CDs. 

• When the process is complete, the system reboots. 
Continue to step 6 to install preloaded system. 

Install preloaded system from CD: 

6. Boot with the recovery CD (and the boot diskette if 
required.) 

7. If the hard-disk drive is blank, the following message 
is displayed: "Your computer originally included a 
Product Recovery program ... Reinstall the 
Product Recovery program? (Y/N) [ ]". 

• To install the service partition, go to step 4. 



General descriptions 25 



Related service information 

• To preload the hard-disk drive without installing the 
service partition, press N key. 

8. If you get a message asking which operating system 
to install, select the proper operating system and 
press Enter. 

9. A message is displayed: "Full Recovery:". Press 
Enter to select. 

10. On each of the next three windows, press the Y key. 

11 . Follow the prompts to complete the recovery. 

To use the Recovery Repair diskette: 

1 . Shut down and turn off the computer. 

2. Insert the Recovery Repair diskette into the drive, and 
then turn on the computer. 

3. Follow the on-screen instructions. 

Passwords 

As many as three passwords may be needed for any 
ThinkPad computer: the power-on password (POP), the 
hard-disk password (HDP), and the supervisor password 
(SVP). 

If any of these passwords has been set, a prompt for it 
appears on the screen whenever the computer is turned 
on. The computer does not start until the password is 
entered. 

Exception: If only an SVP is installed, the password 

prompt does not appear when the operating 
system is booted. 

Power-on password: 

A power-on password (POP) protects the system from 
being powered on by an unauthorized person. The 
password must be entered before an operating system can 
be booted. 

Hard-disk password: 

There are two hard-disk passwords (HDPs): 

• User HDP — for the user 

• Master HDP — for the system administrator, who can use 
it to get access to the hard disk even if the user has 
changed the user HDP 

Note: There are two modes for the HDP: User only and 
Master + User. The Master + User mode requires 
two HDPs; the system administrator enters both in 
the same operation. The system administrator then 
provides the user HDP to the system user. 



26 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Related service information 
Attention: If the user HDP has been forgotten, check 
whether a master HDP has been set. If it has, it can be 
used for access to the hard-disk drive. If no master HDP is 
available, IBM does not provide any services to reset 
either the user or the master HDP, or to recover data from 
the hard-disk drive. The hard-disk drive can be replaced 
for a scheduled fee. 

Supervisor password: 

A supervisor password (SVP) protects the system 
information stored in the IBM BIOS Setup Utility. The SVP 
must be entered in order to get access to the IBM BIOS 
Setup Utility and make changes to system configuration 
settings. 

Attention: If the SVP has been forgotten and cannot be 
made available to the servicer, there is no service 
procedure to reset the password. The system board must 
be replaced for a scheduled fee. 

How to remove the power-on password 

To remove a POP that you have forgotten, do the 
following: 

(A) If no SVP has been set: 

1 . Turn off the computer. 

2. Remove the battery pack. 

For how to remove the battery pack, see "1010 Battery 
pack" on page 60. 

3. Remove the backup battery. 

For how to remove the backup battery, see "1020 
Backup battery" on page 61. 

4. Turn on the computer and wait until the POST ends. 

After the POST ends, the password prompt does not 
appear. The POP has been removed. 

5. Reinstall the backup battery and the battery pack. 

(B) If an SVP has been set and is known by the servicer: 

1. Turn on the computer by pressing and holding F1. 

2. Enter the SVP. The IBM BIOS Setup Utility menu 
appears. 

3. Select Password, using the cursor keys to move down 
the menu. 

4. Select Power-On Password. 

5. At the Enter Current Password field, enter the SVP. 

6. When the Enter New Password field opens, leave it 
blank and press Enter twice. 

7. In the Changes have been saved window, press Enter. 



General descriptions 27 



Related service information 

8. Press F10; then, in the Setup confirmation window, 
select Yes . 

How to remove the hard-disk password 

Attention: If User only mode is selected and the user 
HDP has been forgotten and cannot be made available to 
the servicer, IBM does not provide any services to reset 
the user HDPs or to recover data from the hard-disk drive. 
The hard-disk drive can be replaced for a scheduled fee. 

To remove a user HDP that has been forgotten, when the 
SVP and the master HDP are known, do the following: 

1 . Power on the computer by pressing and holding F1 . 

2. Enter the SVP. The IBM BIOS Setup Utility menu 
appears. 

3. Select Password, using the cursor keys to move down 
the menu. 

4. Select Hard-disk x password, where x is the letter of 
the hard-disk drive. A pop-up window opens. 

5. Select Master HDP. 

6. Enter the master HDP; then leave the New Password 
field blank and press Enter twice. 

7. Press F10. 

8. Select Yes in the Setup Configuration window. 

Both user HDP and master HDP will have been 
removed. 

Power management 

To reduce power consumption, the computer has three 
power management modes: screen blank, standby, and 
hibernation. 



Notes 



Screen blank mode is called standby mode in 
Windows 95 and Windows NT. 
Standby mode is called suspend mode in 
Windows 95 and Windows NT. 



Screen blank mode 

Screen blank mode has three variants, as follows: 

1 . If you press Fn+F3, or the time set on the "LCD off 
timer" in IBM BIOS Setup Utility expires, 

• The LCD backlight turns off. 

• The hard-disk drive motor stops. 

• The speaker is muted. 

2. If you are using the ACPI operating system and you 
press Fn+F3, 

• The LCD backlight turns off. 

28 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Related service information 

• The hard-disk drive motor stops. 

3. If the time set on the "Turn off monitor" timer in the 
operating system expires, 

• The LCD backlight turns off. 

To end screen blank mode and resume normal operation, 
press any key. 

Standby mode 

When the computer enters standby mode, the following 
events occur in addition to what occurs in screen blank 
mode: 

• The LCD is powered off. 

• The hard-disk drive is powered off. 

• The CPU stops. 

To enter standby mode, press Fn+F4. 

Note: You can change the action of Fn+F4, if you are 
using the ACPI operating system. 

In certain circumstances, the computer goes into standby 
mode automatically: 

• If a "suspend time" has been set on the timer, and the 
user does not do any operation with the keyboard, the 
TrackPoint, the hard disk, the parallel connector, or the 
diskette drive within that time. 

• If the battery indicator blinks orange, indicating that the 
battery power is low. (Alternatively, if Hibernate when 
battery becomes low has been selected in the "Power 
Management Properties" window, the computer goes 
into hibernation mode.) 

Note for the APM operating system: 

Even if you do not set the low-battery alarm, the charge 
indicator notifies you when the battery is low, and then the 
computer enters the power-saving mode automatically. 
This default low-battery behavior is independent of the 
operating system; so if you have set the low-battery alarm, 
the computer may not do what you specified. It chooses 
either your setting or the default setting, whichever is 
appropriate. 

If you are using the ACPI operating system, only the 
low-battery alarm is available. 

To cause the computer to return from standby mode and 
resume operation, do one of the following: 

• Press the Fn key. 

• Open the LCD cover (only if you are using Windows Me 
and you entered standby mode by closing the LCD 



General descriptions 29 



Related service information 

• Turn on the power switch. 

Also, the computer automatically returns from standby 
mode and resumes operation in either of the following 
events: 

• The ring indicator (Rl) is signaled by a serial device or a 
PC Card device (Windows 2000 does not support the 
ring indicator (Rl) resume by PC Card device.) 

• The time set on the resume timer elapses. In Windows 
98, the Scheduled Tasks setting takes priority over the 
Resume on timer selection in the "Power Management 
Properties" window. 

Note: The computer does not accept any input 

immediately after it enters standby mode. Wait a 
few seconds before taking any action to reenter 
operation mode. 

Hibernation mode 



" Note for Windows NT 

If you are using Windows NT in the default format, 
NTFS, you cannot create a hibernation file. If you 
want to use hibernation mode, you will need to 
reinstall Windows NT with FAT format. 



- Note for OS/2 

If you are using OS/2 in the default format, HPFS, 
you cannot create a hibernation file. If you want to 
use hibernation mode, you will need to reinstall 
OS/2 with FAT format. 



In hibernation mode, the following occurs: 

• The system status, RAM, VRAM, and setup data are 
stored on the hard disk. 

• The system is powered off. 

Note: If the computer enters the hibernation mode while it 
is docked to the docking station, do not undock it 
from the docking station before resuming normal 
operation. If you do undock it and then try to 
resume normal operation, you will get an error 
message, and you will have to restart the system. 

To cause the computer to enter hibernation mode, do any 
of the following: 

• Press the Fn+F12 keys. 

• If you are using the APM operating system and have set 
the mode to Power switch mode [Hibernation], turn 
off the power switch. 

30 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Related service information 

• If you are using the ACPI operating system and have 
defined one of the following actions as the event that 
causes the system to go into hibernation mode, perform 
that action. 

- Closing the lid. 

- Pressing the power button. 

- Pressing Fn+F4 keys. 

Also, the computer goes into hibernation mode 
automatically in either of the following conditions: 

• If a "hibernation time" has been set on the timer, and the 
user does not do any operation with the keyboard, the 
TrackPoint, the hard-disk drive, the parallel connector, or 
the diskette drive within that time. 

• If the timer conditions are satisfied in suspend mode. 

• If you are using the APM operating system and have set 
the mode to Hibernate when battery becomes low, 

and the battery charge becomes critically low. 

When the power is turned on, the computer returns from 
hibernation mode and resumes operation. The hibernation 
file in the boot record on the hard-disk drive is read, and 
system status is restored from the hard-disk drive. 



General descriptions 31 



Checkout guide 



Checkout guide 

Use the following procedures as a guide in identifying and 
correcting problems with the ThinkPad computer. 

Note: The diagnostic tests are intended to test only IBM 
products. The use of non-IBM products, prototype 
cards, or modified options can lead to false 
indications of errors and invalid system responses. 

1 . Identify the failing symptoms in as much detail as 
possible. 

2. Verify the symptoms. Try to re-create the failure by 
running the diagnostic test or by repeating the 
operation. 

Testing the computer 

The ThinkPad computer has a test program called 
PC-Doctor® DOS (hereafter called PC-Doctor.) You can 
detect errors by running the diagnostics test included in 
PC-Doctor. This section is an overview of the procedure. 
For details that depend on model-unique functions, refer to 
"Product overview" on page 41 . 

For some possible configurations of the computer, 
PC-Doctor might not run correctly. To avoid this problem, 
you need to initialize the computer setup by use of the IBM 
BIOS Setup Utility before you run PC-Doctor. On the IBM 
BIOS Setup Utility screen, press F9, Enter, F10, and then 
Enter. 

Note: When you initialize the computer configuration, 

some devices are disabled, such as the serial port. 
If you test one of these devices, you will need to 
enable it by using PS2.EXE. 

PC-Doctor cannot be used to test a device that is in the 
docking station, even if the computer supports the docking 
station. To test a USB device, connect it to the USB 
connector of the computer. To test the Ultrabay 2000 
device, install it in the Ultrabay 2000 slot of the computer. 

To run the test, do as follows: 

Note: In the following procedure, you can select an item 
not only with the arrow keys, but also with the 
TrackPoint. Instead of pressing Enter, click the left 
button. 

1. Insert the PC-Doctor disk into the diskette drive; then 
power on the computer. 

If the computer cannot be powered on, go to "Power 
system checkout" on page 35, and check the power 
sources. 

32 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Checkout guide 
If an error code appears, go to "Symptom-to-FRU 
index" on page 49. 

On the first screen, select the model and press Enter. 
Follow the instructions on the screen. 

2. The main panel of PC-Doctor appears. 

3. Select Diagnostics with the arrow keys, and press 
Enter. 

A pull-down menu appears. (Its exact form depends on 
the model.) 

The options on the test menu are as follows: 



Diagnostics 


Interactive Tests 


• Run Normal Test 

• Run Quick Test 

• CPU/Coprocessor 

• Systemboard 

• Video Adapter 

• Serial Ports 

• Parallel Ports 

• Fixed Disks 

• Diskette Drives 

• Other Devices 

• ZIP Drive 

• LS-1 20/240 Drive 

• Communication 

• Wireless LAN(*) 

• Memory Test - Full 

• Memory Test - Quick 


• Keyboard 

• Video 

• Internal Speaker 

• Mouse 

• Joystick Test 

• Diskette 

• System Load 

• CD-ROM/DVD Test 

• Stereo Speaker 

• 802.11 Wireless Radio 
Testf) 


Notes: 

• In the Keyboard test in Interactive Tests, the Fn key 

is scanned only once. Each key should be held down 
for at least 2 seconds; otherwise, it cannot be sensed. 

• The sound card is not recognized in the Stereo 
Speaker in the Interactive Tests. To test it, use the 
audio device test in the Other Devices in 
Diagnostics. 

• Video Adapter test supports only the LCD display on 
ThinkPad. Before running PC-Doctor DOS, detach the 
external Monitor. 

• To test ZIP Drive or LS-1 20/240 Drive, each media is 
needed to be inserted before start testing. 

• Wireless LAN test and 802.11 Wireless Radio Test is 
only for some models. Some models do not have 
them. 

• To test Digital Signature Chip, the chip must be 
enabled and initialized. 

• When Legacy Floppy Drives is Enabled in the IBM 
BIOS Setup Utility, Diskette Drives test is activated 
even if no legacy diskette drive is attached to the 
ThinkPad. 



General descriptions 33 



Checkout guide 



nfo Utility Qu 



RunQuickTesl 
CPU/Coprocess 
Systemboard 
Video Adapter 



Diskette Drives 
Other Devices 
ZIP Drive 
LS-12G7240 Drive 
Communication 
Wireless LAN 
Memory Test - Full 
Memory Test - Quic 



uit F1=Help 




i ENTER to select. 



4. Run the applicable function test. 

5. Follow the instructions on the screen. If there is a 
problem, PC-Doctor shows messages describing it. 

6. To exit the test, select Quit — Exit Diag. 

To cancel the test, press Esc. 

Note: After executing PC-Doctor, check the system 
time/date and reset them if needed. 

Detecting system information with 
PC-Doctor 

PC-Doctor can detect the following system information: 

Hardware Info 

System Configuration 
Memory Contents 
Physical Disk Drives 
Logical Disk Drives 
VGA Information 
IDE Drive Info 
PCI Information 
PNPISA Info 
SMBIOS Info 
VESA LCD Info 



Utility 

• Run External Tests 

• Surface Scan Hard Disk 

• Benchmark System 

• DOS Shell 

• Tech Support Form 

• Battery Rundown 

• View Test Log 

• Print Log 

• Save Log 

• Full Erase Hard Drive 

• Quick Erase Hard Drive 



34 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Checkout guide 

Power system checkout 

To verify a symptom, do the following: 

1 . Power off the computer. 

2. Remove the battery pack. 

3. Connect the ac adapter. 

4. Check that power is supplied when you power on the 
computer. 

5. Power off the computer. 

6. Disconnect the ac adapter and install the charged 
battery pack. 

7. Check that the battery pack supplies power when you 
power on the computer. 

If you suspect a power problem, see the appropriate one 
of the following power supply checkouts: 

• "Checking the ac adapter" 

• "Checking operational charging" on page 36 

• "Checking the battery pack" on page 36 

• "Checking the backup battery" on page 37 

Checking the ac adapter 

You are here because the computer fails only when the ac 
adapter is used: 

• If the power problem occurs only when the port 
replicator is used, replace the port replicator. 

• If the power-on indicator does not turn on, check the 
power cord of the ac adapter for correct continuity and 
installation. 

• If the computer does not charge during operation, go to 
"Checking operational charging". 

To check the ac adapter, do the following: 

1. Unplug the ac adapter cable from the computer. 

2. Measure the output voltage at the plug of the ac 
adapter cable. See the following figure: 




Pin 


Voltage (V dc) 


1 


+15.5 to +17.0 


2 


Ground 



(16-10V) 

3. If the voltage is not correct, replace the ac adapter. 

4. If the voltage is acceptable, do the following: 

• Replace the system board. 

• If the problem persists, go to "Product overview" on 
page 41. 

Note: Noise from the ac adapter does not always indicate 
a defect. 

General descriptions 35 



Checkout guide 

Checking operational charging 

To check whether the battery charges properly during 
operation, use a discharged battery pack or a battery pack 
that has less than 50% of the total power remaining when 
installed in the computer. 

Perform operational charging. If the battery status indicator 
or icon does not turn on, remove the battery pack and let it 
return to room temperature. Reinstall the battery pack. If 
the charge indicator or icon still does not turn on, replace 
the battery pack. 

If the charge indicator still does not turn on, replace the 
system board. Then reinstall the battery pack. If it is still 
not charged, go to the next section. 

Checking the battery pack 

Battery charging does not start until the Power Meter 
shows that less than 95% of the total power remains; 
under this condition the battery pack can charge to 100% 
of its capacity. This protects the battery pack from being 
overcharged or from having a shortened life. 

To check the status of your battery, move your cursor to 
the Power Meter icon in the icon tray of the Windows 
taskbar and wait for a moment (but do not click), and the 
percentage of battery power remaining is displayed. To get 
detailed information about the battery, double-click the 
Power Meter icon. 

Note: If the battery pack becomes hot, it may not be able 
to charge. Remove it from the computer and leave it 
at room temperature for a while. After it cools down, 
reinstall and recharge it. 

To check the battery pack, do the following: 

1 . Power off the computer. 

2. Remove the battery pack and measure the voltage 
between battery terminals 1 (+) and 5 (-). See the 
following figure: 




5(-) 4 



Terminal 


Voltage (V dc) 


1 


+0 to +12.6 


5 


Ground (-) 



3. If the voltage is less than +11 .0 V dc, the battery pack 
has been discharged. 



36 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Checkout guide 
Note: Recharging will take at least 3 hours, even if the 
indicator does not turn on. 

If the voltage is still less than +11 .0 V dc after 
recharging, replace the battery. 

4. If the voltage is more than +11.0 V dc, measure the 
resistance between battery terminals 4 and 5. The 
resistance must be 4 to 30 K 0. 

If the resistance is not correct, replace the battery 
pack. If the resistance is correct, replace the system 
board. 

Checking the backup battery 

Do the following: 

1. Power off the computer, and unplug the ac adapter 
from it. 

2. Turn the computer upside down. 

3. Remove the battery pack (see "1010 Battery pack" on 
page 60.) 

4. Remove the backup battery (see "Checking the battery 
pack" on page 36.) 

5. Measure the voltage of the backup battery. See the 
following figure. 



^p 



Black (-) 



Wire 


Voltage (V dc) 


Red 


+2.5 to +3.2 


Black 


Ground 



If the voltage is correct, replace the system board. 

If the voltage is not correct, replace the backup battery. 

If the backup battery discharges quickly after 
replacement, replace the system board. 



General descriptions 37 



Checkout guide 



38 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



ThinkPad T20, T21, T22 and T23 
series 

Product overview 41 

Specifications 43 

Status indicators 45 

FRU Tests 47 

Fn key combinations 48 

Symptom-to-FRU index 49 

Numeric error codes 49 

Error messages 52 

Beep symptoms 53 

No-beep symptoms 53 

LCD-related symptoms 54 

Intermittent problems 55 

Undetermined problems 55 

FRU replacement notices 56 

Screw notices 56 

Retaining serial numbers 57 

Restoring the serial number of the system unit 57 

Retaining the UUID 57 

Removing and replacing a FRU 59 

1010 Battery pack 60 

1 020 Backup battery 61 

1030 Hard-disk drive 63 

1040 DIMM 65 

1050 Mini PCI adapter 66 

For T20, T21 and T22 series 66 

ForT23 series 68 

1060 Ethernet daughter card 71 

1070 Ultrabay 2000 device 73 

1080 Keyboard 74 

For T20, T21 and T22 series 74 

For T23 series 75 

1090 Keyboard CRU insulator 82 

1100 Hinge cover 83 

For T20 and T21 series 84 

For T22 series 86 

For T23 series 87 

1110 Keyboard bezel 88 

For T20, T21 and T22 series 89 

For T23 series 92 

1120 Fan assembly 94 

For T20, T21 , T22 series 94 

For T23 series 97 

1130 CPU 98 

For T20, T21 and T22 series 98 

ForT23 series 99 

1140 PC Card slot assembly 100 

For T20, T21 , T22 series 100 

For T23 series 102 

1150 Speaker 103 

© Copyright IBM Corp. 2002 39 



1160 Hard-disk bay 105 

1170 Ultrabay 2000 slot 107 

For T20 series 107 

For T21 and T22 series 108 

For T23 series 111 

1 1 80 System board 113 

For T20, T21 , T22 series 113 

For T23 series 115 

1190 Secure chip 117 

1200 Microphone cable 118 

2010 LCD assembly 121 

2020 Front bezel 122 

2030 Inverter card 123 

2040 LCD panel 125 

2050 Antenna assembly 128 

2060 Sub card 131 

3010 ThinkPad Dock PCI cover 133 

3020 ThinkPad Dock top cover 136 

Locations 140 

Front view 140 

Rear view 141 

Bottom view 1 42 

Parts list 143 

T20, T21, T22 and T23 series model matrix 146 

Overall 147 

ForT20, T21 and T22 151 

ForT23 156 

AC adapters 1 56 

LCD FRUs 157 

13.3-in. XGATFT 157 

14.1-in. XGATFT 158 

14.1-in. SXGA+TFT 159 

Keyboard 160 

Recovery CDs 161 

For Windows 98 (T22 series) 161 

For Windows 2000 (T22 series) 162 

For Windows 2000/Windows NT (T22 series) 162 

For Windows 98 (T23 series) 163 

For Windows 2000 (T23 series) 164 

For Windows 2000/Windows NT (T23 series) 165 

For Windows XP (T23 series) 166 

Miscellaneous parts 170 

Optional FRUs 171 

Common parts list 172 

Tools 172 

Power cords (system) 172 

Power cords (docking station) 173 

Notices 174 

Trademarks 174 



40 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Product overview 



Product overview 

This section presents the following product-unique 
information: 

• "Specifications" 

• "Status indicators" on page 44 

• "FRU Tests" on page 46 

• "Fn key combinations" on page 48 



Specifications 



The following table lists the specifications of the ThinkPad 
T20, T21, T22 and T23 series : 



Feature 


Description 


Processor 


T20 

• Mobile Intel® Pentium® III processor 650 MHz 

• Mobile Intel® Pentium® III processor 700 MHz 

• Mobile Intel® Pentium® III processor 750 MHz 

T21 

• Mobile Intel® Pentium® III processor 750 MHz 

• Mobile Intel® Pentium® III processor 800 MHz 

• Mobile Intel® Pentium® III processor 850 MHz 

T22 

• Mobile Intel® Pentium® III processor 800 MHz 

• Mobile Intel® Pentium® III processor 900 MHz 
■ Mobile Intel® Pentium® III processor 1 GHz 

T23 

• Mobile Intel® Pentium® III processor 866 
MHz-M 

• Mobile Intel® Pentium® III processor 1.0 
GHz-M 

• Mobile Intel® Pentium® III processor 1.13 
GHz-M 

• Mobile Intel® Pentium® III processor 1.2 
GHz-M 


Bus 

architecture 


PCI Bus 


Memory 
(standard) 


T20, T21,T22 

• 128 MB (PC1 00) (on the system board) 

T23 

• 128 MB (PC1 33) (on the system board) 

• 256 MB (PC1 33) (on the system board) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 41 



Product overview 



Feature 


Description 


Memory 
(optional) 


T20, T21.T22 

• 64 MB, 128 MB, or 256 MB DIMM card 
(maximum of 512 MB) 

T23 

• 64 MB, 128 MB, 256 MB, or 512 MB DIMM 
card (maximum of 1024 MB) 


CMOS RAM 


242 bytes 


Display 


T20 

• 13.3-inch, 16M colors, XGA (1024x768 
resolution) TFT color LCD 

• 14.1 -inch, 16M colors, XGA (1024x768 
resolution) TFT color LCD 

T21,T22, T23 

• 13.3-inch, 16M colors, XGA (1024x768 
resolution) TFT color LCD 

• 14.1 -inch, 16M colors, XGA (1024x768 
resolution) TFT color LCD 

• 14.1-inch, 16M colors, SXGA+ (1400x1050 
resolution) TFT color LCD 


Hard-disk drive 


T20 

• 6.0 GB, 2.5-inch, IDE interface 

• 12.0 GB, 2.5-inch, IDE interface 

• 18.0 GB, 2.5-inch, IDE interface 

• 20.0 GB, 2.5-inch, IDE interface 

T21,T22 

• 10.0 GB, 2.5-inch, IDE interface 

• 20.0 GB, 2.5-inch, IDE interface 

• 32.0 GB, 2.5-inch, IDE interface 

T23 

• 15.0 GB, 2.5-inch, IDE interface 

• 20.0 GB, 2.5-inch, IDE interface 

• 30.0 GB, 2.5-inch, IDE interface 

• 40.0 GB, 2.5-inch, IDE interface 

• 48.0 GB, 2.5-inch, IDE interface 

• 60.0 GB, 2.5-inch, IDE interface 


I/O port 


• External monitor 

• Line-in 

• Headphone 

• Microphone 

• Mouse or keyboard 

• Parallel or diskette drive 

• Port replicator connector 

• Serial 

• One universal serial bus (USB) connector for 
T20, T21 , and T22 series 

• Two USB connectors for T23 

• RJ11 

• RJ45 (covered) 

• TV-out 



(continued) 



42 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Product overview 



Feature 


Description 


Internal 
modem 


56.6 Kbps 


Audio 


• Internal microphone 

• Internal speaker 

• Software control volume 


Infrared 
transfer 


IrDA 1.1 


802.11b (only 
for T23 series) 


Mini PCI Type-Ilia IEEE 802.11b wireless LAN 
card 


PC Card 


One Type-Ill or two Type-ll 


AC adapter 


72-watt type 


Bay device 


T20 

• 1.44 MB (3-mode), 3.5-inch diskette drive 

• 10-24x CD-ROM drive 

• 6x DVD-ROM drive 

T21.T22, T23 

• 1.44 MB (3-mode), 3.5-inch diskette drive 

• 10-24x CD-ROM drive 

• 8x DVD-ROM drive 

• CD-RW drive 

• DVD/CD-RW combo drive 



ThinkPad T20, T21 , T22 and T23 series 43 



Product overview 

Status indicators 

The system status indicators show the status of the 
computer, as follows: 




Indicator 


Meaning 


Q Drive in use 


Green: Data is being read from or written 
to the hard-disk drive, the diskette 
drive, or the drive in the Ultrabay 
2000. When this indicator is on, do 
not put the computer into standby 
mode or turn off the computer. 

Note: Do not move the system while the 
Green drive in use light is on. Sudden physical 
shock could cause drive errors. 


Q Num lock 


Green: The numeric keypad on the 

keyboard is enabled. To enable or 
disable the keypad, press and hold 
the Fn key while pressing the 
NumLk key. 


Caps lock 


Green: Caps Lock mode is enabled. To 
enable or disable Caps Lock 
mode, press Fn + Caps Lock key. 



(continued) 



44 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Product overview 



Indicator 


Meaning 


Q Scroll lock 


Green: Scroll Lock mode is enabled. Arrow 
keys can be used as screen-scroll 
function keys, but not to move the 
cursor. To enable or disable Scroll 
Lock mode, press Fn + ScrLk key. 
Not all application programs 
support this function. 


Q Power on 


Green: This indicator stays lighted 

whenever the computer is on. If 
the power-on indicator is on and 
the standby indicator is off, the 
system is ready to use. If both the 
power-on indicator and the standby 
indicator are on, you can use the 
computer after it returns from the 
standby mode and the standby 
indicator goes off. 


Q Battery 


Green: The battery is fully charged. 
Blinking green: 

The battery has enough power to 
operate, but is being charged. 

Orange: The battery power is low. The 
battery needs to be charged. 

Blinking orange: 

The battery needs to be charged 
when the indicator starts blinking 
orange, the computer beeps three 
times. 


Q Standby 
status 


Green: The computer is in standby mode. 
Blinking green: 

The computer is entering standby 
mode or hibernation mode, or is 
resuming normal operation. This 
indicator does not blink in Windows 
2000, Windows Me, and Windows 
XP. 


Q Ultrabay 
status 


Green: An Ultrabay 2000 device is 

installed and in use. 
Blinking green: 

An Ultrabay 2000 device is in the 

process of being detached. 
Turn off: An Ultrabay 2000 device is ready 

to be attached or detached. 

Note: If you are using Windows 2000 or 
Windows XP, the Ultrabay status indicator 
does not blink while an Ultrabay 2000 device 
is being detached. Instead, a message box 
pops up when the process is completed; then 
the indicator turns off. 



ThinkPad T20, T21 , T22 and T23 series 45 



Product overview 

FRU Tests 

The following table shows the test for each FRU. 



FRU 


Applicable test 


System board 


1 . Diagnostics -> CPU/Coprocessor 

2. Diagnostics -> Systemboard 


Power 


Diagnostics --> Other Devices --> IBM AC 
Adapter, IBM Battery 1 (IBM Battery 2) 


LCD unit 


1 . Diagnostics -> Video Adapter 

2. Interactive Tests -> Video 


Modem 


1 . Make sure the modem is set up correctly. 

2. Replace the modem jack and the modem 
card in turn, and run the following test in 
Diagnostics --> Communication: 

a. Lucent Modem (M2) Loopback 

b. Lucent Modem (M2) Dialtone/DTM 

c. Lucent Soft Modem Loopback (T23 
only) 

d. Lucent Soft Modem Dialtone (T23 only) 

e. Intel Modem Register 

f. Intel Modem Loopback/DTMF 

g. Intel SP Modem Register 

h. Intel SP Modem Loopback/DTMF 
i. 3Com MiniPCI Modem Test 
j. 3Com MiniPCI Dialtone Test 


Audio 


1 . Interactive Tests -> Internal Speaker 

2. Diagnostics -> Other Devices -> Crystal 
SoundFusion™ Test 


Speaker 


Interactive Tests -> Internal Speaker 


PC Card slots 


Diagnostics --> Systemboard --> PCMCIA, 
PCMCIA External Loop 


Keyboard 


1 . Diagnostics -> Systemboard -> 
Keyboard 

2. Interactive Tests -> Keyboard 


TrackPoint or 
pointing device 


If the TrackPoint does not work, check the 
configuration in the ThinkPad Configuration 
program. If the TrackPoint is disabled, select 
Enable to enable it. 

After you use the TrackPoint, the pointer may 
drift on the screen for a short time. This drift 
can occur when a slight, steady pressure is 
applied to the TrackPoint pointer. This symptom 
is not a hardware problem. If the pointer stops 
after a short time, no service action is 
necessary. 

If enabling the TrackPoint does not correct the 
problem, continue with the following: 
• Interactive Tests -> Mouse 


Hard-disk drive 


Diagnostics --> Fixed Disks 



(continued) 



46 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Product overview 



FRU 


Applicable test 


Diskette drive 


1 . Diagnostics — > Diskette Drives 

2. Interactive Tests -> Diskette 


CD-ROM, DVD, 
CD-RW or 
CD-RW/DVD 
combo drive 


1 . Diagnostics --> Other Devices -> 
CD-ROM/DVD 

2. Interactive Tests -> CD-ROM/DVD Test 


Memory 


1. If two DIMMs are installed, remove one of 
them and run Diagnostics -> Memory 
Test - Quick. 

2. If the problem does not recur, return the 
DIMM to its place, remove the other one, 
and run the test again. 

3. If the test does not detect the error, run 
Diagnostics — > Memory Test - Full. 


Fan 


1 . Turn on the computer and check the air 
turbulence at the louver near the power 
switch. 

2. Run Diagnostics -> Other Devices -> 
IBM Fan. 



ThinkPad T20, T21 , T22 and T23 series 47 



Product overview 



Fn key combinations 

The following table shows the function of each combination 
of Fn with a function key. 



Key 
combination 


Description 


Fn+F1 


Reserved. 


Fn+F2 


Reserved. 


Fn+F3 


Turn off the LCD display, leaving the screen 

blank. To turn the LCD display on again, press 

any key or the TrackPoint stick. 

Note: To use Fn+F3 for screen blank in 

Windows 2000 and Windows XP, you must have 

IBM PM device driver installed on your 

computer. 


Fn+F4 


Turn standby mode on. To return to normal 
operation, press the Fn key independently, 
without pressing a function key. 


Fn+F5 


Reserved. 


Fn+F6 


Reserved. 


Fn+F7 


Switch between the LCD and an external 
monitor (CRT). If an external monitor is 
attached, computer output is displayed in the 
following three patterns by turns: 

• CRT display 

• LCD+CRT display 

• LCD 


Fn+F8 


Turn screen expansion on or off. (There is no 
symbol on the key.) 

Note: This function is not supported in Windows 
2000 and Windows XP. 


Fn+F9 


Reserved. 


Fn+F10 


Reserved. 


Fn+F11 


Reserved. 


Fn+F12 


Turn hibernation mode on. To return to normal 

operation, press the power button for less than 

four seconds. 

Note: To use Fn+F12 for hibernation in 

Windows 2000 and Windows XP, you must have 

IBM PM device driver installed on your 

computer. 


Fn+PgUp 


Turn the ThinkLight on or off. 


Fn+Home 


The LCD becomes brighter. 


Fn+End 


The LCD becomes less bright. 



48 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Symptom-to-FRU index 



Symptom-to-FRU index 

The symptom-to-FRU index in this section lists symptoms 
and errors and their possible causes. The most likely 
cause is listed first, in boldface type. 

Note: Do the FRU replacement or other actions in the 
sequence shown in the column headed "FRU or 
action, in sequence." If replacing a FRU does not 
solve the problem, put the original part back in the 
computer. Do not replace a nondefective FRU. 

This index can also help you determine, during regular 
servicing, what FRUs are likely to need to be replaced 
next. 

A numeric error is displayed for each error detected in 
POST or system operation. In the displays, n can be any 
number. 

If no numeric code is displayed, check the narrative 
descriptions of symptoms. If the symptom is not described 
there, go to "Intermittent problems" on page 55. 



- Note 

For an IBM device not supported by diagnostic 
codes in the ThinkPad notebook computers, see the 
manual for that device. 



Numeric error codes 



Symptom or error 


FRU or action, in sequence 


0175 

Bad CRC1, stop POST 

task — The EEPROM checksum 

is not correct. 


System board. 


0187 

EAIA data access error — The 
access to EEPROM is failed. 


System board. 


0188 

Invalid RFID serialization 
information area or bad 
CRC2— The EEPROM 
checksum is not correct. 


System board. 


0189 

Invalid RFID configuration 
information area — The 
EEPROM checksum is not 
correct. 


System board. 


0190 

Critical low-battery error 


1 . Charge the battery pack. 

2. Battery pack. 



ThinkPad T20, T21 , T22 and T23 series 49 



Symptom-to-FRU index 



Symptom or error 


FRU or action, in sequence 


0193 


Enter the supervisor 


RF antenna has been removed 


password. 


0194 


Enter the supervisor 


The computer has been carried 


password. 


through a security gate 




0195 


1. Enter IBM BIOS Setup 


Security hardware tamper 


Utility by entering 


detected 


supervisor password, and 




select "Password" -> 




"IBM Security Chip" -> 




"Clear IBM Security Chip" 




to clear this error. 




2. Security chip. 




3. System board. 


0196 


1. Enter IBM BIOS Setup 


Security hardware removed 


Utility by entering 




supervisor password, and 




select "Password" -> 




"IBM Security Chip" -> 




"Clear IBM Security Chip" 




to clear this error. 




2. Security chip. 




3. System board. 


0197 


The remote configuration for 


Invalid remote change 


the security chip has failed. 


requested 


Confirm the operation and try 




again. 


01 C9 


1 . Remove the Ethernet 


More than one Ethernet devices 


device that you installed; 


are found. Remove one of 


or press Esc to ignore the 


them. Press <Esc> to continue. 






warning message. 




2. System board. 


0200 


1 . Reseat the hard-disk 


Hard disk error — The hard disk 


drive. 


is not working. 


2. Load Setup Defaults in IBM 




BIOS Setup Utility. 




3. Hard-disk drive. 




4. System board. 


021 x 


Run interactive tests of the 


Keyboard error 


keyboard and the auxiliary 




input device. 


0220 


Load Setup Defaults in IBM 


Monitor type error — Monitor 


BIOS Setup Utility. 


type does not match the one 




specified in CMOS. 




0230 


System board. 


Shadow RAM error — Shadow 




RAM fails at offset nnnn. 




0231 


1. DIMM. 


System RAM error — System 


2. System board. 


RAM fails at offset nnnn. 





50 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Symptom-to-FRU index 



Symptom or error 


FRU or action, in sequence 


0232 

Extended RAM 

error — Extended RAM fails at 

offset nnnn. 


1. DIMM. 

2. System board. 


0250 

System battery error — System 
battery is dead. 


Replace the backup battery 
and run IBM BIOS Setup 
Utility to reset the time and 
date. 


0251 

System CMOS checksum 
bad — Default configuration 
used. 


Replace the backup battery 
and run IBM BIOS Setup 
Utility to reset the time and 
date. 


0252 

Password checksum bad — The 
password is cleared. 


Reset the password by 
running IBM BIOS Setup 
Utility. 


0260 

System timer error 


1 . Replace the backup 
battery and run IBM BIOS 
Setup Utility to reset the 
time and date. 

2. System board. 


0270 

Real time clock error 


1 . Replace the backup 
battery and run IBM BIOS 
Setup Utility to reset the 
time and date. 

2. System board. 


0271 

Date and time error — Neither 
the date nor the time is set in 
the computer. 


Run IBM BIOS Setup Utility to 
reset the time and date. 


02B2 

Incorrect drive A type 


1 . Diskette drive. 

2. External FDD cable. 

3. I/O card. 


02F4 

EISA CMOS not writable 


1 . Load Setup Defaults in 
IBM BIOS Setup Utility. 

2. Replace the backup battery. 

3. System board. 


02F5 

DMA test failed 


1. DIMM. 

2. System board. 


02F6 

Software NMI failed 


1. DIMM. 

2. System board. 


02F7 

Fail-safe timer NMI failed 


1. DIMM. 

2. System board. 



ThinkPad T20, T21 , T22 and T23 series 51 



Symptom-to-FRU index 

Error messages 



Symptom or error 


FRU or action, in sequence 


Device address conflict. 


1 . Load "Setup Defaults" in 
IBM BIOS Setup Utility. 

2. Backup battery. 

3. System board. 


Allocation error for device. 


1 . Load "Setup Defaults" in 
IBM BIOS Setup Utility. 

2. Backup battery. 

3. System board. 


Failing bits: nnnn. 


1. DIMM. 

2. System board. 


Invalid system configuration 
data. 


1. DIMM. 

2. System board. 


I/O device IRQ conflict. 


1 . Load "Setup Defaults" in 
IBM BIOS Setup Utility. 

2. Backup battery. 

3. System board. 


Operating system not found. 


1 . Check that the operating 
system has no failure and is 
installed correctly. 

2. Enter IBM BIOS Setup 
Utility and see whether 
the hard-disk drive and 
the diskette drive are 
properly identified. 

3. Reseat the hard-disk drive. 

4. Reinstall the operating 
system. 

5. Diskette drive. 

6. Hard-disk drive. 

7. System board. 


Hibernation error. 


1 . Restore the system 
configuration to what it 
was before the computer 
entered hibernation mode. 

2. If memory size has been 
changed, re-create the 
hibernation file. 


Fan error. 


Fan. 


Thermal sensing error. 


System board. 



52 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Symptom-to-FRU index 



Beep symptoms 



Symptom or error 


FRU or action, in sequence 


One beep and a blank, 
unreadable, or flashing LCD. 


1 . Reseat the LCD 
connector. 

2. LCD assembly. 

3. External CRT. 

4. System board. 


One long and two short beeps, 
and a blank or unreadable 
LCD. 


1 . System board. 

2. LCD assembly. 

3. DIMM. 


Two short beeps with error 
codes. 


POST error. See "Numeric 
error codes" on page 49. 


Two short beeps and a blank 
screen. 


1 . System board. 

2. DIMM. 


Two or more beeps, or a 
continuous beep. Operating 
system starts successfully. 


If a mini-PCI Ethernet card is 
installed, confirm that Alert On 
LAN 2 in IBM BIOS Setup 
Utility is disabled. 


Three short beeps, pause, 
three more short beeps, and 
one short beep. 


1. DIMM. 

2. System board 


One short beep, pause, three 
short beeps, pause, three more 
short beeps, and one short 
beep. 


Only cursor appears. 


Reinstall operating system. 



No-beep symptoms 



Symptom or error 


FRU or action, in sequence 


No beep, power-on indicator 
on, LCD blank, and no POST. 


1 . Make sure that every 
connector is connected 
tightly and correctly. 

2. DIMM. 

3. System board. 


No beep, power-on indicator 
on, and LCD blank during 
POST. 


1 . Reseat DIMM. 

2. System board. 


The power-on password prompt 
appears. 


A power-on password or a 
supervisor password is set. 
Type the password and press 
Enter. 


The hard-disk password prompt 
appears. 


A hard-disk password is set. 
Type the password and press 
Enter. 


The DOS full screen looks 
smaller. 


Start the ThinkPad 
Configuration program and set 
the Screen expansion 

function. 



ThinkPad T20, T21 , T22 and T23 series 53 



Symptom-to-FRU index 

LCD-related symptoms 

" Important 

The TFT LCD for the notebook computer contains 
many thin-film transistors (TFTs). A small number of 
dots that are missing, discolored, or always lighted 
is characteristic of TFT LCD technology, but 
excessive pixel problems can cause viewing 
concerns. The LCD should be replaced if the 
number of missing, discolored, or lighted dots in any 
background is: 

• XGA: 8 or more bright dots, 8 or more dark dots, 
or a total of 9 or more bright and dark dots. 

• SXGA+: 11 or more bright dots, 13 or more dark 
dots, or a total of 16 or more bright and dark 
dots. 

Note: A bright dot means a pixel is always on 

(white or color.) A dark dot means a pixel is 
always off (black color.) 



Symptom or error 


FRU or action, in sequence 


No beep, power-on indicator 
on, and a blank LCD during 
POST. 


System board. 


■ LCD backlight not working. 

• LCD too dark. 

• LCD brightness cannot be 
adjusted. 

• LCD contrast cannot be 
adjusted. 


1. 

2. 
3. 


Reseat the LCD 
connectors. 

LCD assembly. 
System board. 


• LCD screen unreadable. 

• Characters missing pixels. 

• Screen abnormal. 

• Wrong color displayed. 


1. 

2. 
3. 
4. 


See important note for 
"LCD-related symptoms." 

Reseat all LCD connectors. 
LCD assembly. 
System board. 


Horizontal or vertical lines 
displayed on LCD. 


LCD assembly. 



54 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Symptom-to-FRU index 

Intermittent problems 

Intermittent system hang problems can be due to a variety 
of causes that have nothing to do with a hardware defect, 
such as cosmic radiation, electrostatic discharge, or 
software errors. FRU replacement should be considered 
only when a problem recurs. 

When analyzing an intermittent problem, do the following: 

1. Run the diagnostic test for the system board in loop 
mode at least 10 times. 

2. If no error is detected, do not replace any FRUs. 

3. If any error is detected, replace the FRU shown by the 
FRU code. Rerun the test to verify that no more errors 
exist. 

Undetermined problems 

You are here because the diagnostic tests did not identify 
which adapter or device failed, wrong devices are installed, 
a short circuit is suspected, or the system is inoperative. 
Follow these procedures to isolate the failing FRU (do not 
isolate FRUs that have no defects). 

Verify that all attached devices are supported by the 
computer. 

Verify that the power supply being used at the time of the 
failure is operating correctly. (See "Power system 
checkout" on page 35.) 

1 . Power off the computer. 

2. Visually check each FRU for damage. Replace any 
damaged FRU. 

3. Remove or disconnect all of the following devices: 

a. Non-IBM devices 

b. Devices attached to the port replicator 

c. Printer, mouse, and other external devices 

d. Battery pack 

e. Hard-disk drive 

f. External diskette drive 

g. DIMM 

h. CD-ROM and diskette drive in the Ultrabay 
i. PC Cards 

4. Power on the computer. 

5. Determine whether the problem has changed. 

6. If the problem does not recur, reconnect the removed 
devices one at a time until you find the failing FRU. 

7. If the problem remains, replace the following FRUs one 
at a time (do not replace a nondefective FRU): 

a. System board 

b. LCD assembly 



ThinkPad T20, T21 , T22 and T23 series 55 



FRU replacement notices 



FRU replacement notices 

This section contains notices related to removing and 
replacing parts. Read this section carefully before replacing 
any FRU. 

Screw notices 

Loose screws can cause a reliability problem. In IBM 
ThinkPad computer, this problem is addressed with special 
nylon-coated screws that have the following characteristics: 

• They maintain tight connections. 

• They do not easily come loose, even with shock or 
vibration. 

• They are harder to tighten. 

• They should be used only once. 

Do the following when you service this machine: 

• Keep the screw kit (for the P/N, see "Miscellaneous 
parts" on page 167) in your tool bag. 

• Always use new screws. 

• Use a torque screwdriver if you have one. 

Tighten screws as follows: 

• Plastic to plastic 

Turn an additional 90 degrees after the screw head 
touches the surface of the plastic part: 

90 degrees more 




(Cross-section) 

Logic card to plastic 

Turn an additional 180 degrees after the screw head 
touches the surface of the logic card: 

180 degrees more 




(Cross-section) 

Torque driver 

If you have a torque driver, refer to the "Torque" column 
for each step. 



56 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



FRU replacement notices 

• Make sure you use the correct screw. If you have a 
torque screwdriver, tighten all screws firmly to the torque 
shown in the table. Never use a screw that you 
removed. Use a new one. Make sure the screws are 
tightened firmly. 

Retaining serial numbers 

This section includes the following descriptions: 

• "Restoring the serial number of the system unit" 

• "Retaining the UUID" 

Restoring the serial number of the system 
unit 

When the computer was manufactured, the EEPROM on 
the system board was loaded with the serial numbers of 
the system and all major components. These numbers 
need to remain the same throughout the life of the 
computer. 

If you replace the system board, you must restore the 
serial number of the system unit to its original value. 

Before replacing the system board, save the original serial 
number by doing the following: 

1. Install the ThinkPad hardware maintenance diskette 
version 1 .62, and restart the computer. 

2. From the main menu, select 1. Set System 
Identification. 

3. Select 2. Read S/N data from EEPROM. 

The serial number for each device is displayed. Write 
down the serial number of the system unit, designated as 
follows: 

20: System unit serial number 

After you have replaced the system board, restore the 
serial number by doing the following: 

1. Install the ThinkPad hardware maintenance diskette 
version 1 .62 and restart the computer. 

2. From the main menu, select 1. Set System 
Identification. 

3. Select 1. Add S/N data from EEPROM. 

Follow the instructions on the screen. 

Note: The serial number of the system unit is written on 
the label attached on the bottom of the computer. 

Retaining the UUID 

The Universally Unique Identifier (UUID) is a 128-bit 
number uniquely assigned to your computer at production 



ThinkPad T20, T21 , T22 and T23 series 57 



FRU replacement notices 

and stored in the EEPROM of your system board. The 
algorithm that generates the number is designed to provide 
unique IDs until the year A.D. 3400. No two computers in 
the world have the same number. 

When you replace the system board, you must set the 
UUID on the new system board as follows: 

1 . Install the ThinkPad hardware maintenance diskette 
version 1 .62, and restart the computer. 

2. From the main menu, select 4. Assign UUID. 

A new UUID is created and written. If a valid UUID 
already exists, it is not overwritten. 



58 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



Removing and replacing a FRU 

This section presents directions and drawings for use in 
removing and replacing a FRU. Be sure to observe the 
following general rules: 

1. Do not try to service any computer unless you have 
been trained and certified. An untrained person runs 
the risk of damaging parts. 

2. Before replacing any FRU, review "FRU replacement 
notices" on page 56. 

3. Begin by removing any FRUs that have to be removed 
before the failing FRU. Any such FRUs are listed at the 
top of the page. Remove them in the order in which 
they are listed. 

4. Follow the correct sequence in the steps for removing 
the FRU, as indicated in the drawings by the numbers 
in square callouts. 

5. When turning a screw to replace a FRU, turn it in the 
direction indicated by the arrow in the drawing. 

6. When removing the FRU, move it in the direction 
indicated by the arrow in the drawing. 

7. To put the new FRU in place, reverse the removal 
procedure and follow any notes that pertain to 
replacement. For information about connecting and 
arranging internal cables, see "Locations" on page 140. 

8. When replacing a FRU, use the correct screw as 
shown in the procedures. 



A DANGER 



Before removing any FRU, power off the computer, 
unplug all power cords from electrical outlets, 
remove the battery pack, and then disconnect any 
interconnecting cables. 



Attention: Before the computer is powered on after FRU 
replacement, make sure that all screws, springs, and other 
small parts are in place and are not loose inside the 
computer. Verify this by shaking the computer gently and 
listening for rattling sounds. Metallic parts or metal flakes 
can cause electrical short circuits. 

Attention: The system board is sensitive to, and can be 
damaged by, electrostatic discharge. Before touching it, 
establish personal grounding by touching a ground point 
with one hand or by using an electrostatic discharge (ESD) 
strap (P/N 6405959). 

ThinkPad T20, T21 , T22 and T23 series 59 



Removing and replacing a FRU 

1010 Battery pack 

A DANGER 



Use only the battery in the parts listing for your 
computer. Use of an incorrect battery can result in 
ignition or explosion of the battery. 




60 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



1020 Backup battery 

A DANGER 



Use only the battery in the parts listing for your 
computer. Use of an incorrect battery can result in 
ignition or explosion of the battery. 



For access, remove this FRU: 
• "1010 Battery pack" on page 60 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 3.5 mm, (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 61 



Removing and replacing a FRU 

Cable routing: When attaching the backup battery to the 

holder, route the battery cable as in the 

following figure. 




62 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



1030 Hard-disk drive 



~ Attention 

Do not drop or apply any shock to the hard-disk 
drive. The hard-disk drive is sensitive to physical 
shock. Incorrect handling can cause damage and 
permanent loss of data. 

Before removing the drive, have the user make a 
backup copy of all the information on the drive if 
possible. 

Never remove the drive while the system is 
operating or is in suspend mode. 



For access, remove this FRU: 
• "1010 Battery pack" on page 60 




Note: The hard disk is attached to the cover. 



Step 


Screw (quantity) 


□ 


Coin screw (1) or security screw (1) 


Note: 


Use a 2.5-mm Allen wrench to remove the security screw. 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 63 



Removing and replacing a FRU 

When removing the hard-disk drive, open the LCD a little 

as shown in the figure. 




When installing: Make sure that the HDD connector is 
firmly connected. 



64 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1040 DIMM 

For access, remove this FRU: 
• "1 01 Battery pack" on page 60 

Note: Loosen the screw Q , but do not remove it. 




When installing: With the notched end of the DIMM 

toward the socket, insert the DIMM into 
the socket, and then press it firmly. Pivot 
the DIMM until it snaps into place. Make 
sure that the card is firmly fixed in the 
slot and does not move easily. 



ThinkPad T20, T21 , T22 and T23 series 65 



Removing and replacing a FRU 

1050 Mini PCI adapter 

For access, remove this FRU: 
• "1 01 Battery pack" on page 60 

For T20, T21 and T22 series 

Note: Loosen the screw fl , but do not remove it. 




(continued) 



66 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

Note: The following illustration shows the combo card. 
Connector (A) is for the LAN feature and (B) is for 
the modem feature. Disconnect either (A) or (B) in 
step Q . This slot also supports a Mini PCI modem 
card or Mini PCI network card. 





(continued) 



ThinkPad T20, T21 , T22 and T23 series 67 



Removing and replacing a FRU 

When installing: Make sure not to pinch the connector 

cable when re-installing the Mini PCI 

adapter. 




®^=! 



m 



For T23 series 

Note: Loosen the screw Q , but do not remove it. 




(continued) 



68 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
In step |H and E3 , pull the tab of the each antenna 
cables to unplug the cables. 




When installing: Plug the gray antenna cable |3 into 
jack J1 (MAIN), and the black antenna 
cable B3 into jack J2 (AUX). 




When installing: With the notched end of the card toward 
the socket, insert the card into the 
socket, and then press it firmly. Pivot the 
card until it snaps into place. Make sure 
that the card is firmly fixed in the slot 
and does not move easily. 



ThinkPad T20, T21 , T22 and T23 series 69 



Removing and replacing a FRU 

1060 Ethernet daughter card 

- Note 

This section is only for the following models of T23 
series; 

• All models of MT2647 excepting xQx, L4x 

• All models of MT2648 

Other models do not have the Ethernet daughter 
card (EDC). 



For access, remove this FRU: 
• "1010 Battery pack" on page 60 

Note: Loosen the screw Q , but do not remove it. 




(continued) 



70 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 11.5 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 71 



Removing and replacing a FRU 





When installing: Make sure that both of the connectors 
Q and Q are firmly attached. 



72 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1070 Ultrabay 2000 device 

Any of several devices can be inserted into the Ultrabay 
2000. The procedure for installing and removing is the 
same for every device. 

Ultrabay 2000 also supports Ultrabay Plus device, such as 
Ultrabay Plus carrier. 

Note: When you release the switch in step Q the lever 
pops out. Pull the lever a little in step Q to release 
the device from the bay. 




ThinkPad T20, T21 , T22 and T23 series 73 



Removing and replacing a FRU 

1080 Keyboard 

For access, remove these FRUs, in order: 

• "1 01 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1 070 Ultrabay 2000 device" on page 73 

For T20, T21 and T22 series 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 14 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



Note: T20, T21 and T22 series do not have the removal 
procedures Q to Q . After step Q , go to step 

B 

(continued) 



74 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

For T23 series 

Note: Loosen the screw Q , but do not remove it. 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 14 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 




Step 


Screw (quantity) 


Torque 


D 


M2.5 x 11.5 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 75 



Removing and replacing a FRU 

Note: Step Q to [Q are common for all models. 




(continued) 



76 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




(continued) 



ThinkPad T20, T21 , T22 and T23 series 77 



Removing and replacing a FRU 

Note: Before installing a new keyboard, attach the 
easy-button cover as follows: 





(continued) 



78 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
When installing the keyboard, do as follows: 
1. Install the new keyboard, following the directions in the 
figure. Make sure that the keyboard edges, shown in 
the figure as (A), (B), and (C), are under the frame. 




(continued) 



ThinkPad T20, T21 , T22 and T23 series 79 



Removing and replacing a FRU 

2. Insert your fingers into the PC Card slot on the left of 
the computer and the Ultrabay 2000 slot on the right of 
the computer as shown in Q . Then, with your fingers 
in those slots as in Q , latch the keyboard in place by 
using your thumbs to press firmly on the shift keys. 
Press the Y key to connect the keyboard to the 
connector on the underside of the key . 




(continued) 



80 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
To make sure that the front side of the keyboard is 
housed firmly, gently press the shift keys with your 
thumbs and try to slide the keyboard towards you. Do 
not push parts (A) and (B) on the keyboard strongly; to 
do so might cause distortion of the Ultrabay 2000 slot 
and the PC Card slot. 




Replace the screws, using the new screws provided 
with the keyboard. Then press the Y key again, hard, 
to make sure that the keyboard is firmly connected. 



ThinkPad T20, T21 , T22 and T23 series 81 



Removing and replacing a FRU 

1090 Keyboard CRU insulator 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 



Note: The shape of the keyboard CRU insulator varies 
from model to model. In some models, the shape 
might be slightly different from the insulator in this 
figure. 




82 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1100 Hinge cover 

For access, remove these FRUs, in order: 

• "1010 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1070 Ultrabay 2000 device" on page 73 

• "1080 Keyboard" on page 74 

• "1090 Keyboard CRU insulator" on page 82 

Note: Step Q is common for all models. 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 14 mm, nylon-coated (3) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 83 



Removing and replacing a FRU 

For T20 and T21 series 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



When installing: 

1 . Install the hinge cover according to the step Q , Q 
and then tighten the screw Q . In step Q , take care 
not to damage the lens. 

2. Make sure that both latches Q are firmly attached 
and snap into place. 



84 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For T22 series 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 85 



Removing and replacing a FRU 



j — = — i iii — = — t 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



When installing: 

1 . Install the hinge cover according to the step Q , Q 
and then tighten the screw Q . In step , take care 
not to damage the lens. 

2. Make sure that both latches Q are firmly attached 
and snap into place. 



86 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For T23 series 




Step 


Screw (quantity) 


Torque 


G 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



When installing: 

1. Install the hinge cover according to the step Q , Q 
and then tighten the screw Q . In step Q , take care 
not to damage the lens. 

2. Make sure that both latches Q are firmly attached 
and snap into place. 



ThinkPad T20, T21 , T22 and T23 series 87 



Removing and replacing a FRU 

1110 Keyboard bezel 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 



For T20, T21 and T22 series 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 3.5 mm, nylon-coated (3) 


0.392 Nm 
(4 kgfcm) 



(continued) 



88 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


G 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 


B 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 89 



Removing and replacing a FRU 

For T23 series 

Note: Loosen the screw Q , but do not remove it. 





Step 


Screw (quantity) 


Torque 


B 


M2.5 x 11.5 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



90 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


D 


M2.5 x 3.5 mm, nylon-coated (3) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 91 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


a 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 


□ 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



92 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
When installing, do as follows: 

• Make sure that the 0-part is firmly attached as shown 
in the figure. 

• Make sure that all of the latches of the keyboard bezel 
Qare firmly attached. 




ThinkPad T20, T21 , T22 and T23 series 93 



Removing and replacing a FRU 

1120 Fan assembly 

For T20, T21, T22 series 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1 080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 




Notes: 

1 . Q -part is for T21 , T22 series only. Other models do 
not have this bracket. 

2. Q -part is for T21 series and MT2647-3Cx, -3Ex, 
-7Cx, -7Ex (T22 series) only. Other models do not have 
this bracket. 



Step 


Screw (quantity) 


Torque 


□ 


M2 x 13.5 mm, nylon-coated (4) 


0.245 Nm 
(2.5 kgfcm) 



(continued) 



94 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
When installing the fan assembly: 
For T20 

Remove the protective sheet from the thermal rubber 
on the fan assembly. 




ForT21,T22 

Apply the thermal grease (05K5751) on the Q-part of 
the fan as shown in the following figure. 




ThinkPad T20, T21 , T22 and T23 series 95 



Removing and replacing a FRU 

For T23 series 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1 080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 




Step 


Screw (quantity) 


Torque 


□ 


M2 x 13.5 mm, nylon-coated (1) 


0.245 Nm 
(2.5 kgfcm) 


Q 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 

(4 kgfcm) 



(continued) 



96 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


D 


M2.0 x 13.5 mm, nylon-coated (3) 


0.245 Nm 
(2.5 kgfcm) 



When installing: Apply the thermal grease (05K5751) on 
the Q -part of the fan as shown in the 
following figure. 




ThinkPad T20, T21 , T22 and T23 series 97 



Removing and replacing a FRU 

1130 CPU 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1120 Fan assembly" on page 94 



For T20, T21 and T22 series 

Rotate the the head of the screw (A) to the direction of the 
arrow Q to release the lock and then remove the CPU. 




When installing: 

1 . When attaching the CPU to the socket, do as shown in 
the step Q . 

2. Rotate the head of the screw (A) to the direction of the 
arrow Q to lock the CPU. 



98 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For T23 series 



Note: The shape of the CPU socket vary from model to 
model. When removing or installing the CPU, 
confirm the shape of the CPU socket and do either 
steps Q , Q and Q or steps Q| . B and Q . 

Rotate the head of the screw to the direction of the arrow 
] or EH to release the lock and then remove the CPU. 




When installing: Rotate the head of the screw to the 

direction of the arrow Q or Q| to lock 
the CPU. 



ThinkPad T20, T21 , T22 and T23 series 99 



Removing and replacing a FRU 

1140 PC Card slot assembly 

For T20, T21, T22 series 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1 080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 




Step 


Screw (quantity) 


Torque 


□ 


M2 x 13.5 mm, nylon-coated (4) 


0.245 Nm 
(2.5 kgfcm) 



(continued) 



1 00 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
When installing the PC card slot assembly, do as shown in 
the figure. 




°1 


' j mi 


^ 


B a 
i — i i i 


— 




LhJ 


□ 








□ 




1 


[\^ 


l 2>( ) 


O 


( ^ ' 


O 


1/ ( ) 


O 


O 


1° 








(\ — 





ThinkPad T20, T21 , T22 and T23 series 1 01 



Removing and replacing a FRU 

For T23 series 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1 080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 




Step 


Screw (quantity) 


Torque 


□ 


M2 x 13.5 mm, nylon-coated (4) 


0.245 Nm 
(2.5 kgfcm) 



1 02 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1150 Speaker 

For access, remove these FRUs, in order: 

• "1010 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1 070 Ultrabay 2000 device" on page 73 

• "1080 Keyboard" on page 74 

• "1090 Keyboard CRU insulator" on page 82 

• "1100 Hinge cover" on page 83 

• "1110 Keyboard bezel" on page 88 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 14 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



ThinkPad T20, T21 , T22 and T23 series 1 03 



Removing and replacing a FRU 

Before installing new speaker for T22 and T23 series: 

Secure speaker RF bracket ( Q ) to the new speaker with 
an adhesive tape inside of the bracket. 

For T22 series 




For T23 series 




1 04 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1160 Hard-disk bay 

For access, remove these FRUs, in order: 

• "1010 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1 070 Ultrabay 2000 device" on page 73 

• "1080 Keyboard" on page 74 

• "1090 Keyboard CRU insulator" on page 82 

• "1100 Hinge cover" on page 83 

• "1110 Keyboard bezel" on page 88 

• "1 1 50 Speaker" on page 1 03 

Note: Step Q and Q are only for the case when Asset 
ID RF adapter has been attached into the hard-disk 
bay. 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



ThinkPad T20, T21 , T22 and T23 series 1 05 



Removing and replacing a FRU 

When installing: Make sure the followings: 

• Q -parts of the insulation do not come off. 

• Q -part ( |B s are only for T23 series) is not turned 
over. 

• Holes in the guide rail and in the aluminium sheet are 
aligned, and the aluminium sheet does not protrude in 
the Q -parts. The protruding parts of the sheet can 
cause electrical short. 




1 06 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1170 Ultrabay 2000 slot 

For access, remove these FRUs, in order: 

• "1010 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1 070 Ultrabay 2000 device" on page 73 

• "1080 Keyboard" on page 74 

• "1090 Keyboard CRU insulator" on page 82 

• "1100 Hinge cover" on page 83 

• "1110 Keyboard bezel" on page 88 

For T20 series 







Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



Note: T20 series do not have the removal procedure B 
and Q . After step Q , go to step Q . 

When installing: Make sure that the FPC connector is 
firmly attached. 

(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 07 



Removing and replacing a FRU 

For T21 and T22 series 




Note: T21 series do not have the removal procedure B 
and Q . After step Q , go to step Q . 

When installing: Make sure that the FPC connector is 
firmly attached. 

(continued) 



1 08 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For T23 series 




Step 


Screw (quantity) 


Torque 


□ 


M2 x 13.5 mm, nylon-coated (1) 


0.245 Nm 
(2.5 kgfcm) 


G 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 09 



Removing and replacing a FRU 




Note: The models with 13.3-in. XGA LCD in T20 series 
and in T21 series do not have FPC bracket (0). 
For those models, skip step Q . 



'&, 



r/ 



L o o o <-> o 

o ° o ^ o 



When installing: Make sure that the FPC bracket is firmly 
attached as shown in the figure Q . 

(continued) 



110 ThinkPad T20, T21, T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
Note: Step Q to step Q are common for T20, T21 , T22 
and T23 series. 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 




Step 


Screw (quantity) 


Torque 


a 


M2 x 13.5 mm, nylon-coated (2) 


0.245 Nm 
(2.5 kgfcm) 


□ 


M2.5 x 4.8 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



ThinkPad T20, T21 , T22 and T23 series 111 



Removing and replacing a FRU 

When installing: Make sure that the guide of the slot is 
firmly attached Q and if the eject lever 
has been poped out, push it back in the 
direction of arrow Q until it snaps, and 
then push the upper-right corner of the 
slot Q to fix it firmly. 




) O O O C M G 

o o o o o o 
) o o o o o o 
o o o o o o 



112 ThinkPad T20, T21, T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

1180 System board 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1040 DIMM" on page 65 
"1050 Mini PCI adapter" on page 66 
"1060 Ethernet daughter card" on page 70 (only for T23 
series) 

"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"1130 CPU" on page 98 
"1140 PC Card slot assembly" on page 100 
"1150 Speaker" on page 103 
"1160 Hard-disk bay" on page 105 
"1170 Ultrabay 2000 slot" on page 107 



For T20, T21, T22 series 




Step 


Screw (quantity) 


Torque 


D 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 1 3 



Removing and replacing a FRU 

When installing: Make sure that all of the guides are 
firmly attached Q and you have 
fastened the connector firmly to the 
underside of the system board Q . 




1 1 4 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For T23 series 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 4.8 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 1 5 



Removing and replacing a FRU 

When installing: Make sure that all of the guides are 
firmly attached Q and you have 
fastened the connector firmly to the 
underside of the system board Q . 




116 ThinkPad T20, T21, T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



1190 Secure chip 



- Note 

This section is only for the following models; 

• MT2647-5Lx, 9Lx, DLT, HLU 

• MT2647-5Dx, 5Fx, 5Hx, 5Jx, 5Nx, 5Mx, 9Dx, 9Fx, 
9Hx, 9Jx, 9Nx, 9Mx, DFx, HNx, NNx 

• MT2647-5Ftx, 5Sx, 5Ux, 9Rx, 9Sx, 9Ux, HSU 

Other models do not have the secure chip. 



For access, remove these FRUs, in order: 

• "1010 Battery pack" on page 60 

• "1020 Backup battery" on page 61 

• "1 030 Hard-disk drive" on page 63 

• "1040 DIMM" on page 65 

• "1050 Mini PCI adapter" on page 66 

• "1060 Ethernet daughter card" on page 70 

• "1 070 Ultrabay 2000 device" on page 73 

• "1 080 Keyboard" on page 74 

• "1090 Keyboard CRU insulator" on page 82 

• "1100 Hinge cover" on page 83 

• "1110 Keyboard bezel" on page 88 

• "1120 Fan assembly" on page 94 

• "1140 PC Card slot assembly" on page 100 

• "1 1 50 Speaker" on page 1 03 

• "1160 Hard-disk bay" on page 105 

• "1 1 70 Ultrabay 2000 slot" on page 1 07 

• "1 1 80 System board" on page 1 1 3 




When installing: Make sure that the connector is firmly 
attached. 



ThinkPad T20, T21 , T22 and T23 series 1 1 7 



Removing and replacing a FRU 

1200 Microphone cable 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1040 DIMM" on page 65 
"1050 Mini PCI adapter" on page 66 
"1070 Ultrabay 2000 device" on page 73 
"1 080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"1140 PC Card slot assembly" on page 100 
"1150 Speaker" on page 103 
"1160 Hard-disk bay" on page 105 
"1170 Ultrabay 2000 slot" on page 107 
"1180 System board" on page 113 




Cable routing: When replacing the cable, make sure the 
connector is firmly attached into place Q . 
Cable slacking is only allowed at the 
Q -part of the frame. 




118 ThinkPad T20, T21, T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

2010 LCD assembly 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1050 Mini PCI adapter" on page 66 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1 1 00 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 4.8 mm, nylon-coated (4) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 1 9 



Removing and replacing a FRU 

For models excepting MT2647-xLx, xNx 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 


□ 


M2.5 x 4.8 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



1 20 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 



For MT2647-xLx, xNx 




Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 14 mm, nylon-coated (1) 


0.392 Nm 
(4 kgfcm) 





M2.5 x 4.8 mm, nylon-coated (2) 


0.392 Nm 
(4 kgfcm) 



ThinkPad T20, T21 , T22 and T23 series 1 21 



Removing and replacing a FRU 

2020 Front bezel 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"2010 LCD assembly" on page 119 




Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 4.8 mm, nylon-coated (3) 


0.392 Nm 

(4 kgfcm) 



1 22 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

2030 Inverter card 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"2010 LCD assembly" on page 119 
"2020 Front bezel" on page 122 




Cable routing: When replacing the inverter card, route 
the connector cable as in the following 
figure: 




ThinkPad T20, T21 , T22 and T23 series 1 23 



Removing and replacing a FRU 

2040 LCD panel 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"2010 LCD assembly" on page 119 
"2020 Front bezel" on page 122 
"2030 Inverter card" on page 123 



Remove the UltraPort adapter if it has been screwed onto 
the LCD. To do this, remove the screw from both side of 
the adapter as shown in the figure |Q . Remove the 
connector cover for the others as shown in the figure [Q . 




(continued) 



1 24 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 




Step 


Screw (quantity) 


Torque 


For 13.3-in. XGA LCD LG (05K9636), 14.1-in. XGA LCD Hitachi 
(05K9568), 14.1-in. SXGA+ LCD Hitachi (46L2493) 


B 


M2 x 4 mm, nylon-coated (4) 


0.245 Nm 
(2.5 kgfcm) 


For 14.1-in. XGA LCD LG (05K9567), SAMSUNG (05K9678), 
Hyundai (05K9940), DBU (05K9888), 14.1-in. SXGA+ LCD LG 
(46L2495) 


m 


M2 x 4 mm, nylon-coated (4) 


0.245 Nm 
(2.5 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 25 



Removing and replacing a FRU 




(continued) 



1 26 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
Cable routing: When installing the LCD, route the 

connector cable as in the following figure: 




ThinkPad T20, T21 , T22 and T23 series 1 27 



Removing and replacing a FRU 

2050 Antenna assembly 



Note 








This section 


is only for MT2647-xFx, 


xjx, xLx, 


xNx, 


xSx. Other models do not have the antenna 




assembly. 









For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"2010 LCD assembly" on page 119 
"2020 Front bezel" on page 122 
"2030 Inverter card" on page 123 
"2040 LCD panel" on page 1 24 




(continued) 



1 28 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
Strip off the insulation tapes Q securing the antenna 
cables. 





ThinkPad T20, T21 , T22 and T23 series 1 29 



Removing and replacing a FRU 

Cable routing: Route the antenna cables as follows; 

1 . Hook the black antenna cable to projection ( Q ) on the 
right corner of the rear cover. 

2. Route the black antenna cable to go through cable 
guides Q and Q . 

3. Hook the gray antenna cable to projection ( Q ) on the 
left corner of the rear cover. 

4. Route the gray antenna cable to go through cable 
guides Q . 

5. Make sure that both of the cables are not twisted. 

6. Stick insulation tapes Q , Q and Q . 




1 30 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

2060 Sub card 

For access, remove these FRUs, in order: 
"1010 Battery pack" on page 60 
"1020 Backup battery" on page 61 
"1030 Hard-disk drive" on page 63 
"1040 DIMM" on page 65 
"1050 Mini PCI adapter" on page 66 
"1070 Ultrabay 2000 device" on page 73 
"1080 Keyboard" on page 74 
"1090 Keyboard CRU insulator" on page 82 
"1100 Hinge cover" on page 83 
"1110 Keyboard bezel" on page 88 
"1120 Fan assembly" on page 94 
"1140 PC Card slot assembly" on page 100 
"1150 Speaker" on page 103 
"1160 Hard-disk bay" on page 105 
"1170 Ultrabay 2000 slot" on page 107 
"1180 System board" on page 113 
"2010 LCD assembly" on page 119 




Step 


Screw (quantity) 


Torque 


□ 


Hex stud (6) 


0.392 Nm 
(4 kgfcm) 


Q 


M2.5 x 4.8 mm, nylon-coated (4) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 31 



Removing and replacing a FRU 




When installing, do the following: 

• Attach the I/O card spacer ( Q ) onto the new sub card 
and make sure that the connector is firmly attached. 

• Make sure that the eject lever is poped out Q and then 
install the sub card. 

• Take care not to damage the switch on the sub card (A). 

• Make sure that the guide of the card is firmly attached 
Q as shown in the figure. 





o oo 
o o 



— I — ^ Hl " l 



1 32 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

3010 ThinkPad Dock PCI cover 

Before replacing the PCI cover: 

There are two types of ThinkPad Dock, as follows: 

• ThinkPad Dock: FRU no. 08N1546 (PCI cover: FRU no. 
05K6246) 




ThinkPad Dock with extension plate: FRU no. 08N1537 
(PCI cover: FRU no. 08N7317) 




Confirm the FRU no. of the ThinkPad Dock first and 
choose the proper PCI cover FRU for the ThinkPad Dock 
you are servicing. 



ThinkPad T20, T21 , T22 and T23 series 1 33 



Removing and replacing a FRU 

Note: The following illustration shows how to remove the 
PCI cover of ThinkPad Dock (FRU no. 08N1546). 
Do the same to remove the PCI cover of ThinkPad 
Dock with extension plate (FRU no. 08N1537). 




(Bottom view) 



1 34 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 

3020 ThinkPad Dock top cover 



- Note 

This section is only for the ThinkPad Dock (FRU no. 
08N1546). The top cover and screw kit for ThinkPad 
Dock (FRU no. 12P4143) is not available for the 
ThinkPad Dock with extension plate (FRU no. 
08N1537) . 




(Rear view) 



Step 


Screw (quantity) 


Torque 


□ 


M2.5 x 4.8 mm (2) 


0.392 Nm 
(4 kgfcm) 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 35 



Removing and replacing a FRU 




(Bottom view) 



Step 


Screw (quantity) 


Torque 


Q 


M2.5 x 4.8 mm (8) 


0.392 Nm 
(4 kgfcm) 



(continued) 



1 36 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
Make sure that the system lock key A is set to the Unlock 
position. Release the front latches in step Q . and then 
remove the top cover Q . For step Q , see the inside 
view, shown in the circle. 




ThinkPad T20, T21 , T22 and T23 series 1 37 



Removing and replacing a FRU 

When replacing the top cover, do the following: 

• Make sure that the springs are placed correctly. 




Make sure that the device release lever is seated 
correctly. 




(continued) 



1 38 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Removing and replacing a FRU 
Make sure that the release button works correctly. 




ThinkPad T20, T21 , T22 and T23 series 1 39 



Locations 

Locations 
Front view 

Q System status indicators 

Q Power switch 

B Battery, standby mode, and Ultrabay status 

indicators 

Q Bay latch 

Q Eject button 

Q Ultrabay 2000 device 

Note: The Ultrabay 2000 accepts storage devices, 
such as a DVD drive or a CD-ROM drive. 
Q TrackPoint pointing stick 
Q TrackPoint buttons 

ThinkPad button 
ITl Volume and mute buttons 





1 40 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Locations 



Rear view 

Q Security keyhole 

Q TV-out connector 

B Serial connector 

Q Parallel connector 

Q External-monitor connector 

Q Modem connector 

Q Ethernet connector 

Q Power jack 

Q Universal serial bus (USB) connector 

Note: T23 series have two USB connectors. 
IT1 External-input-device connector 





ThinkPad T20, T21 , T22 and T23 series 1 41 



Locations 


Bottom view 


D 


Built-in stereo speakers 


U 


Battery pack 


U 


Battery pack latches 


u 


Docking connector 


B 


Mini PCI card slot 


□ 


DIMM 


D 


PC card slots 


Q 


PC card eject button 


□ 


Infrared port 


ira 


Stereo headphone jack 


EQ 


Stereo line-in jack 


EQ 


Microphone jack 


ES 


Hard-disk drive 


ED 


LCD latches 




1 42 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 

Parts list 

T20, T21, T22 and T23 series model 
matrix 

The T20, T21 , T22 and T23 series includes several 
models. The following table summarizes the characteristics 
of each model, to help you determine which FRU in the 
part list meets your need. 



Model 


CPU 


Bay 
device 


Mini PCI 
adapter 


LCD 


HDD 


T20 (Memory: 128 MB) (*): Memory 64 MB 

(**): Memory 256 MB 


2647-21 x, 61 x 


CMG 
650 


CD- 
ROM 


Modem 


13.3-in. 


6 GB 


2647-24X, 64x 


Combo 

(Intel) 


XGA 


2647-Alx 


— 


— 


— 


2647-31 x 


DVD- 
ROM 
(6x) 


Modem 


14.1-in. 
XGA 


6 GB 


2647-2EY 


CD- 
ROM 


Combo 
(3Com) 


13.3-in. 
XGA 


12 GB 


2647-32X, 72x 

(*) 


CMG 
700 


Modem 


2647-T1x(") 


14.1-in. 
XGA 


2647-41 x, 81 x, 
43x 


DVD- 
ROM 
(6x) 


Modem 


2648-41 x, 81 x 


2647-42X, 82x 


— 


2648-42X, 82x 


2647-44X, 84x 


Combo 
(Intel) 


2648-44X, 84x 


2647-46X, 86x 


Combo 
(3Com) 


2648-46X, 86x 


2647-45X 


FDD 


Ethernet 


2647-B1X 


— 


— 


— 


2647-Llx, L2x 


CMG 
750 


CD- 
ROM 


Modem 


14.1-in. 
XGA 


20 GB 


2647-52X, 92x 


DVD- 
ROM 
(6x) 


2647-55x, 95x 


Combo 

(Intel) 


2647-Clx 


— 


— 


— 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 43 



Parts list 



Model 


CPU 


Bay 
device 


Mini PCI 
adapter 


LCD 


HDD 


T21 (Memory: 128 MB) 


2647-27X, 67x 


CMG 
750 


CD- 
ROM 


Modem 


13.3-in. 
XGA 


10 GB 


2647-2AX, 6Ax 


Combo 
(Xircom) 


2647-4BX, 8Bx 


Combo 
(3Com) 


2647-47X, 49x, 
87x, L7x 


CMG 
800 


DVD- 
ROM 
(8x) 


Modem 


14.1-in. 
XGA 


20 GB 


2648-47X, 87x 


2647-4AX, 8Ax 


Combo 
(Xircom) 


2648-4AX, 8Ax 


Combo 
(Intel) 


2647-4BX, 8Bx 


Combo 
(3Com) 


2648-4BX, 8Bx 


2647-57X, 97x 


CMG 
850 


Modem 


14.1-in. 


32 GB 


2647-5AX, 9Ax 


Combo 
(Xircom) 


SXGA+ 


2647-5BX, 9Bx 


Combo 
(3Com) 


T22 (Memory: 128 MB) 


2647-3Cx, 7Cx 


CMG 
800 


CD- 
ROM 


Modem 


13.3-in. 


10 GB 


2647-3EX, 7Ex, 
B2x, B3x, B4x, 
B5x 


Combo 
(Intel) 


XGA 


2647-4Cx,4Gx, 
8Gx, 8Cx,M2x, 
M3x, LCx 


CMG 
900 


DVD- 
ROM 
(8x) 


Modem 


14.1-in. 
XGA 


20 GB 


2648-4Cx, 8Cx 


2647-4EX, 8Ex, 
M4x, M5x 


Combo 
(Intel) 


2648-4EX, 8Ex 


2647-4GX, 8Gx 


Combo 
(3Com) 


2648-4GX, 8Gx 


2647-T2X 


FDD 


Combo 
(Intel) 


2647-5Cx, 9Cx 


CMG 
1G 


DVD- 
ROM 
(8x) 


Modem 


14.1-in. 


32 GB 


2647-5EX, 9Ex, 
M6x 


Combo 
(Intel) 


SXGA+ 



(continued) 



1 44 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



Model 


CPU 


Bay 
device 


Mini PCI 
adapter 


LCD 


HDD 


T23 (Memory: 128 MB) (**): Memory 256 MB 


2647-2Kx except 

2KC 

2647-6Kx except 

xxC 

2647-AKx, BAx, 

BJx, EKx 


Tual 
866 


CD- 
ROM 


Modem 


13.3-in. 
XGA 


15 GB 


2647-2KC, 6KC 


DVD- 
ROM 
(8x) 


2647-2Rx, 6Rx 


Tual 
1.0 


CD- 
ROM 


14.1-in. 
XGA 


20 GB 


2647-2TX, 2UC, 
6UC, 3RG, 7RG 


DVD- 
ROM 
(8x) 


2648-2TX 


2647-3TK, 7TK 


CD- 
ROM 


30 GB 


2647-T4X (**) 


Tual 
1.13 


14.1-in. 
XGA 


2647-4MX, 8Mx, 
MMx 


DVD- 
ROM 

(8x) 


2648-4MX, 8Mx 


2647-4QX, 8Qx 

■1 


2647-4NX, 8Nx, 
GNU, KNG, MNx 


802.11/ 
v.90 


14.1-in. 
XGA 
with 
antenna 


2648-4NX, 8Nx 


2647-4Rx, 8Rx 


Tual 
1.2 


Modem 


14.1-in. 
XGA 


40 GB 


2648-4RX, 8Rx 


2647-4Sx, 8Sx, 
BSx 


802.11/ 
v.90 


14.1-in. 
XGA 
with 
antenna 


2648-4SX, 8Sx 


2647-5KX, 9Kx 


Tual 
1.13 


Modem 


14.1-in. 
SXGA+ 


48 GB 


2647-5LX, 9Lx, 
DLT, HLU " 2 


802.11/ 
v.90 


14.1-in. 
SXGA+ 
with 
antenna 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 45 



Parts list 



Model 


CPU 


Bay 
device 


Mini PCI 
adapter 


LCD 


HDD 


T23 (Memory: 128 MB) (**): Memory 256 MB 


2647-5MX, 9Mx 


Tual 
1.2 


CD- 
RW 


Modem 


14.1-in. 
SXGA+ 


48 GB 


2647-5NX, 9Nx, 
HNx, NNx " 2 


802.11/ 
v.90 


14.1-in. 
SXGA+ 
with 
antenna 


2647-5Fx, 9Fx, 
DFx" 2 


DVD- 
ROM 
(8x) 


2647-5DX, 9Dx " 2 


Modem 


14.1-in. 
SXGA+ 


2647-5HX, 9Hx " 2 


DVD/ 
CD- 
RW 
combo 


2647-5Jx, 9Jx * 2 


802.11/ 
v.90 


14.1-in. 
SXGA+ 
with 
antenna 


2647-5Ux, 9Ux " 2 


Tual 
1.2 


DVD- 
ROM 
(8x) 


Modem 


14.1-in. 
SXGA+ 


60 GB 


2647-5Rx, 9Rx " 2 

(**) 


DVD/ 
CD- 
RW 
combo 


2647-5Sx, 9Sx, 
HSx " 2 (**) 


802.11/ 
v.90 


14.1-in. 
SXGA+ 
with 
antenna 


• CMG xxx: Mobile Intel® Pentium 1 " III processor xxx GHz (MHz) 
■ Tual xxx: Mobile Intel® Pentium® III processor xxx GHz 

(MHz)-M 

• *1 : no EDC feature, *2: featuring Secure chip 



1 46 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



Overall 

For T20, T21 and T22 




ThinkPad T20, T21 , T22 and T23 series 1 47 



Parts list 

• Each FRU is available for all types or models, unless 
specific types or models are given. 

• The FRUs marked with asterisk are CRUs (customer 
replaceable units.) 

• The FRUs marked with [!Q are also available as 
optional FRUs. 



No. 


FRU 


P/N 


a-l 


See "Miscellaneous parts" on page 1 67. 


1 


LCD unit (see "LCD FRUs" on page 157) 


2 


Keyboard bezel for T20 


for all models except xxK 


46P2615 


for models xxK 


46P2616 


Keyboard bezel for T21 and T22 


for all models except xxK 


46P2613 


for models xxK 


46P2614 


3 


Fan assembly for T20 


08K7066 


Fan assembly for T21 


04P3448 


Fan assembly for T22 


for 2647-3xx, 7xx, BxG 


08K7268 


for 2648-all 

for 2647-all except models 3xx, 7xx, BxG 


26P9317 


4 


PC Card slots 


08K7064 


5 


I/O card 


26P8023 


I/O card with conformal coating 


08K3373 


6 


Microphone cable assembly 


27L0520 


7 


Base cover for T20 


for 2647-all except models xxK, xxT 


08K6079 


for 2647-xxK 


08K6350 


for 2647-xxT 


08K6346 


for 2648-all except models xxK, xxT 


08K6369 


for 2648-xxK 


08K6372 


for 2648-xxT 


08K6370 


Base cover for T21 


for 2647-all except models xxK 


26P9291 


for 2647-xxK 


04P3446 


for 2648-all except models xxK 


04P3445 


for 2648-xxK 


04P3447 



(continued) 



1 48 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



No. 


FRU 


P/N 


7 


Base cover for T22 


for 2647-3xx, 7xx, Bxx except models xxK 


26P9291 


for 2647-3xK, 7xK, BxK 


26P9309 


for 2647-4xx, 5xx, 8xx, 9xx, Mxx, Lxx 
except models xxK 


08K7362 


for 2647-4xK, 5xK, 8xK, 9xK, MxK, LxK 


26P9174 


for 2648-all except models xxK 


26P9173 


for 2648-xxK 


26P9175 


8 


Ultrabay 2000 diskette drive (TEAC) 


08K9606* 


Ultrabay 2000 diskette drive (SONY) 


08K9607* 


Ultrabay 2000 CD-ROM drive (TOSHIBA) 

m 


27L3973* 


Ultrabay 2000 CD-ROM drive (TEAC), low 
power FT3 


27L3436* 


Ultrabay 2000 CD-ROM drive (LG) EQ 


27L4141* 


Ultrabay 2000 CD-ROM drive (LG), low 
power FT3 


27L4301* 


Ultrabay 2000 DVD drive 6x (MKE) EH 


05K9188* 


Ultrabay 2000 DVD drive 6x (TOSHIBA) EH 


05K9160* 


Ultrabay 2000 DVD drive 8x (MKE) EH 


27L4241* 


Ultrabay 2000 DVD drive 8x (HITACHI) EQ 


27L4236* 


for other optional Ultrabay 2000 devices, see "Optional 
FRUs"on page 170. 


9 


Cover, DIMM slot 


08K6090* 


10 


Battery pack, Panasonic EQ 


for all models except xxE, xxj 


02K6626* 


for models xxE, xxj 


02K6857* 


Battery pack, SANYO EQ 


for all models except xxE, xxj 


02K6627* 


for models xxE, xxj 


02K6859* 


11 


Backup battery 


02K6572 


12 


Cover, Mini PCI adapter slot 


08K6091* 


13 


Speaker assembly 


08K6089 


14 


64-MB SDRAM SO DIMM (PC100) EH 


20L0264* 


128-MB SDRAM SO DIMM (PC100) EQ 


20L0265* 


for other optional DIMM, see "Optional FRUs" on 
page 170. 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 49 



Parts list 



No. 


FRU 


P/N 


15 


Mini PCI modem card [jQ 

for T20 (models x1x except T1U, x2x, x3x, 
BxG) 


08K3429* 


Mini PCI modem card (Ambit) 

for T20, T21 (models x1x, x2x, x3x, xxG) 


08K4855* 


Mini PCI modem card (Hoshi CR) 
for T21 (models x7x except x7G) 


08K3338* 


Mini PCI modem card (Ambit), V.92 ready 
for T22 (models xCx) 


08K4853* 


Mini PCI combo card (Intel) EJ 

for T20 (models x4x, x5x), T21 (models 
xAJ, xAK) 


08K3125* 


Mini PCI combo card (3Com) |jQ 

for T20 (models x6x), T21 (models xBx) 


00N8117* 


Mini PCI combo card (Intel) EJ 
for T21 (models xBx) 


06P3829* 


Mini PCI combo card (Intel CR) EJ 
for T21 (models xAx except xAJ, xAK) 


19K5888* 


Mini PCI combo card (Intel), V.92 ready E2 
for T22 (models xEx, BxG, 6xx, PM5, T2x) 


06P3809* 


Mini PCI combo card (3Com) |jQ 
for T22 (2647-4Gx, 8Gx, MxU) 


22P6753* 


Mini PCI Ethernet card E3 
for T20 (2647-45G, 45U) 


10L1423* 


for other optional Mini PCI adapter, see "Optional FRUs" 
on page 170. 


16 


System board 


for T20 (all models except 2647-5xx, 9xx, 
Lxx) 


12P3360 


for T20 (2647-5xx, 9xx, Lxx) 


12P3363 


for T21 (all models except 2647-5xx, 9xx 
Cxx) 


12P3366 


for T21 (2647-5xx, 9xx Cxx) 


12P3369 


for T22 (2647-3xx, 7xx Bxx) 


26P8096 


for T22 (all models except 2647-3xx, 7xx 
Bxx) 


26P8098 


17 


CPU, Pentium III 650 MHz 


10L1405 


CPU, Pentium III 700 MHz 


10L1417 


CPU, Pentium III 750 MHz 


08K3191 


CPU, Pentium III 800 MHz 


08K3246 


CPU, Pentium III 850 MHz 


08K3248 


CPU, Pentium III 900 MHz 


08K3346 


CPU, Pentium III 1 GHz 


08K3392 



(continued) 



1 50 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



No. 


FRU 


P/N 


18 


Asset ID RF adapter (see "Optional FRUs" on page 170) 


19 


Hard-disk drive (6.0 GB), STD EJ 


05K9227* 


Hard-disk drive (6.0 GB), HITACHI E3 


05K9228* 


Hard-disk drive (10.0 GB), STD liTl 


08K9508* 


Hard-disk drive (10.0 GB), HITACHI EJ 


08K9531* 


Hard-disk drive (12.0 GB), STD [iTJ 


05K9229* 


Hard-disk drive (12.0 GB), HITACHI EJ 


05K9230* 


Hard-disk drive (20.0 GB), STD liTJ 


27L4286* 


Hard-disk drive (20.0 GB), HITACHI EJ 


08K9533* 


Hard-disk drive (30.0 GB), STD EJ 


08K9564* 


Hard-disk drive (32.0 GB), STD EJ 


08K9509* 


for other optional hard-disk drive, see "Optional FRUs" on 
page 1 70. 


20 


Cover, hard-disk drive for T20 


08K6092* 


Cover, hard-disk drive for T21, T22 


04P3496* 


21 


Keyboard* (see "Keyboard" on page 160) 


22 


Pointing stick cap 


84G6536* 


23 


Easy button cover for T22 


26P9183 


24 


Bracket, LCD FPC 


26P9178 


— 


Shield, Mini PCI 




— 


Blank cap for RJ45 (for T20) 


04P3975 


— 


Telephone cable (San Tai) 


27L0603 


— 


Recovery CD (see "Recovery CDs" on page 161 .) 


— 


AC adapter* (see "AC adapters" on page 156.) 



ThinkPad T20, T21 , T22 and T23 series 1 51 



Parts list 

For T23 




1 52 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 
Each FRU is available for all types or models, unless 
specific types or models are given. 
The FRUs marked with one asterisk are CRUs 
(customer replaceable units.) 
The FRUs marked with [!Q are also available as 
optional FRUs. 



No. 


FRU 


P/N 


a-k 


See "Miscellaneous parts" on page 1 67. 


1 


LCD unit (see "LCD FRUs" on page 157) 


2 


Keyboard bezel for T23 (all models except 
xxK) 


46P2611 


for models xxK 


46P2612 


3 


Fan assembly for T23 


26P9166 


4 


PC Card slots for T23 


26P9165 


5 


I/O card assembly for T23 


26P8006 


6 


Microphone cable assembly 


27L0520 


7 


Base cover for 2647 (T23) 


for models except xjx, xFx, xLx, xNx, xSx, 
xxC, xxK, xxT 


26P9158 


for models xDC, xKC, xMC, xPC, xUC, 
2TC, xRC 


26P9162 


for models xHK, xKK, xMK, xPK, xRK, 
2TK, 3TK, 7TK 


26P9160 


for models xHT, xKT, xMT, xPT, xRT, 2TT 


46L4922 


Base cover for 2647 wireless (T23) 


for models xjx except xJK, xJT 
for models xFx except xFC 
for models xLx except xLK, xLT 
for models xNx except xNC, xNK, xNT 
for models xSx except xSC, xSK, xST 


46L4972 


for models xNC, xFC, xSC, x5TC, 9TC 


46L4934 


for models xJK, xLK, xNK, xSK 


26P9611 


for models xJT, xLT, xNT, xST 


46L4923 


Base cover for 2648 (T23) 


for models except 4Nx, 8Nx, xxC, xxK, 
xSx, xxT 


26P9159 


for models 4MC, 4PC, 8MC, 8PC, 2TC, 
xRC 


26P9163 


for models 4MK, 4PK, 8MK, 8PK, 2TK, 
xRK 


26P9161 


for models 4MT, 4PT, 8MT, 8PT, 2TT, xRT 


46L4924 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 53 



Parts list 



No. 


FRU 


P/N 


7 


Base cover for 2648 wireless (T23) 


for models xNx, xSx, except xNC, xNK, 
xNT, xSC, xSK, xST 


46L4921 


for models 4NC, 8NC, xSC 


46L4935 


for models 4NK, 8NK, xSK 


46L4933 


for models 4NT, 8NT, xST 


46L4925 


8 


Ultrabay 2000 CD-ROM drive (LG), low 
power m 


27L4301* 


Ultrabay 2000 CD-ROM drive (TEAC), low 
power IJT3 


27L3436* 


Ultrabay 2000 DVD-ROM drive 8x (MKE) 

m 


27L4241 * 


Ultrabay 2000 DVD-ROM drive 8x (MKE), 
light weight EJ 


08K9648* 


Ultrabay 2000 DVD-ROM drive 8x (HITACHI) 

m 


27L4236* 


Ultrabay 2000 DVD-ROM drive 8x (HLDS), 
light weight FT3 


08K9646* 


Ultrabay 2000 DVD-ROM drive 8x (TOSHIBA) 

m 


27L4213* 


Ultrabay 2000 CD-RW drive (SONY) EH 


27L4231* 


Ultrabay 2000 CD-RW drive (TEAC) ELI 


27L4297* 


Ultrabay 2000 DVD/CD-RW combo drive 
(TOSHIBA) HJ 


27L4249* 


Ultrabay 2000 DVD/CD-RW combo drive 
(KME) ELI 


27L4359* 


for other optional Ultrabay 2000 devices, see "Optional 
FRUs"on page 170. 


9 


Cover, DIMM slot for T23 


26P9421* 


10 


Battery pack, PANASONIC ELI 


for models xKx, xQx, L4x except xxE, xxj 


02K6626* 


for models xKE, xKJ 


02K6857* 


Battery pack, SANYO ELI 


for models xKx, xQx, L4x except xxE, xxj 


02K6627* 


for models xKE, xKJ 


02K6859* 


Battery pack, PANASONIC 2.0 Ah ELI 


for all models except xKx, xQx, L4x 


02K7026* 


for models xxE, xxj except xKE, xKJ 


02K7030* 


Battery pack, SANYO 2.0 Ah ELI 


for all models except xKx, xQx, L4x 


02K7028* 


for models xxE, xxj except xKE, xKJ 


02K7032* 


11 


Backup battery 


02K6572 



(continued) 

1 54 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



No. 


FRU 


P/N 


12 


Cover, Mini PCI adapter slot 


08K7416* 


13 


Speaker assembly 


08K6089 


14 


128-MB SDRAM SO DIMM (PC133) E3 


19K4653* 


256-MB SDRAM SO DIMM (PC133) E3 


19K4655* 


for other optional DIMMs, see "Optional FRUs" on 
page 170. 


15 


Mini PCI modem card (Ambit) [jQ 

for all models except 2647-xFx, xjx, xLx, 
xNx, xSx, 5TC, 9TC, and 2648-xNx, xSx 


08K4853* 


Mini PCI 802.11b/v.92 modem card 
(ACTIONTEC) 

2647-xFx, xjx, xLx, xNx, xSx, 5TC, 9TC, 

and 2648-xNx, xSx 


12P3657 


16 


System board for models except 2647-4Rx, 
8Rx, BSx, 4Sx, 8Sx, DRx, DSx, and 
2648-4RX, 8Rx, 4Sx, 8Sx 
Note: Use a new system board with the 
same FRU no. as the original FRU. 


26P8218 


12P3770 


System board 

2647-4Rx, 8Rx, BSx, 4Sx, 8Sx, DRx, DSx 
2648-4Rx, 8Rx, 4Sx, 8Sx 


12P3770 


17 


CPU assembly, mobile Intel® Pentium® III 
processor 866 MHz-M 


26P7999 


CPU assembly, mobile Intel® Pentium® III 
processor 1 .0 GHz-M 


26P8122 


CPU assembly, mobile Intel® Pentium® III 
processor 1.13 GHz-M 


26P8082 


CPU assembly, mobile Intel® Pentium® III 
processor 1 .2 GHz-M 


26P8005 


18 


Asset ID RF adapter (see "Optional FRUs" on page 170) 


19 


Hard-disk drive (15.0 GB), HITACHI EJ 


08K9587* 


Hard-disk drive (15.0 GB), STD [ill 


08K9585* 


Hard-disk drive (20.0 GB), HITACHI EJ 


08K9533* 


Hard-disk drive (20.0 GB), STD FT3 


27L4286* 


Hard-disk drive (30.0 GB), HITACHI EJ 


08K9592* 


Hard-disk drive (30.0 GB), STD EH 


27L4291* 


Hard-disk drive (40.0 GB), STD liTJ 


08K9683* 


Hard-disk drive (40.0 GB), HITACHI EJ 


08K9767* 


Hard-disk drive (48.0 GB), STD FT3 


08K9599* 


Hard-disk drive (60.0 GB), STD HI 


08K9700* 


20 


Cover, hard-disk drive for T23 


26P9543* 


21 


Keyboard* (see "Keyboard" on page 160.) 


22 


Pointing stick cap 


84G6536* 


23 


Easy button cover 


26P9536 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 55 



Parts list 



No. 


FRU 


P/N 


24 


Ethernet daughter card (Ambit) |jQ 
for all models except 2647-xQx 


26P8181 


25 


Secure chip EJ 

for 2647-5xx except 5Kx, 9xx except 9Kx 
for 2647-HNx, xLx 


26P8084 


— 


Telephone cable (SAN TAI) 


27L0603 


— 


Recovery CD (see "Recovery CDs" on page 161 .) 


— 


AC adapter* (see "AC adapters".) 



AC adapters 



FRU 


P/N 


AC adapter (72 W), 2-pin (ASTEC) EJ 

for models xxE, xxF, xxj, xxP, xxS, xxU, xxX 


02K6753* 


AC adapter (72 W), 2-pin (DELTA) EJ 

for models xxE, xxF, xxj, xxP, xxS, xxU, xxX 


02K6756* 


AC adapter (72 W), 2-pin (SANKEN) 

for models xxE, xxF, xxj, xxP, xxS, xxU, xxX 


02K6757* 


AC adapter (72 W), 3-pin (ASTEC) EQ 

for models xxA, xxB, xxC, xxG, xxH, xxK, xxM, 
xxT, xxY 


02K6751* 


AC adapter (72 W), 3-pin (DELTA) EJ 

for models xxA, xxB, xxC, xxG, xxH, xxK, xxM, 
xxT, xxY 


02K6754* 



1 56 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



LCD FRUs 




Notes: 

1. The parts marked with * are only for 13.3-in. LCD 
cover kit. 

2. 5 is for the models with 14. 1 -in. XGA TFT with antenna 
and for the models with 14.1 -in. SXGA+ TFT with 
antenna. 

3. 6 is only for 2647-52x, 92x, C2x, L1x. 

13.3-in. XGA TFT 



No. 


FRU 


P/N 


1 


LCD cover kit (13.3-in.) XGA (except models 
xxK) 


08K6685 


models xxK 


08K6764 


2 


LCD cable assembly 13.3 


27L0562 


3 


LCD panel, 13.3 XGA (LG) 


05K9636 


4 


Hinges 


08K6087 


5 


not available for this model 


— 


6 


not available for this model 


— 


7 


Inverter card 


10L1402 



ThinkPad T20, T21 , T22 and T23 series 1 57 



Parts list 

14.1-in. XGATFT 



No. 


FRU 


P/N 


1 


LCD cover kit (14.1-in.) XGA 


for T20, T21 (except models xxK) 


26P9566 


for T20, T21 (models xxK) 


26P9567 


for T22, T23 (except models xxK) 


46L4843 


for T22, T23 (models xxK) 


46L4844 


LCD cover antenna kit (except models xxK) 


46L4910 


models xxK 


46L4911 


2 


LCD cable assembly 14.1 XGAforT20, T21 


27L0519 


LCD cable assembly 14.1 XGA (CR) for T22, 
T23 


27L0640 


3 


LCD panel, 14.1 XGA (LG) 


05K9567 


LCD panel, 14.1 XGA (HITACHI) for T20, T21 


05K9568 


LCD panel, 14.1 XGA (SAMSUNG) for T20, 
T21 


05K9944 


LCD panel, 14.1 XGA (HYUNDAI) for T20, 
T21 


05K9940 


LCD panel, 14.1 XGA (LG) X10 Light Weight 


11P8241 


LCD panel, 14.1 XGA (HITACHI) Light Weight 
for T22, T23 


11P8258 


LCD panel, 14.1 XGA (SAMSUNG) Light 
Weight for T22, T23 


46L2292 


LCD panel, 14.1 XGA (DBU) Light Weight for 
T22, T23 


05K9888 


4 


Hinges 


08K6087 


Hinges for antenna 


26P9196 


5 


Antenna assembly 


26P9197 


6 


Thermal hinge (only for 2647-52x, 92x, C2x, 
L1x) 


08K6353 


7 


Inverter card 


10L1402 



1 58 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



14.1-in. SXGA+TFT 



No. 


FRU 


P/N 


1 


LCD cover kit (14.1-in.) SXGA+ (except 
models xxK) 


26P9383 


models xxK 


26P9385 


LCD cover antenna kit (except models xxK) 


46L4910 


models xxK 


46L4911 


2 


LCD cable assembly 14.1 SXGA+ 


27L0590 


3 


LCD panel, 14.1 SXGA+ (HITACHI) 


46L2493 


LCD panel, 14.1 SXGA+ (LG) 


46L2495 


4 


Hinges 


08K6087 


Hinges tor antenna 


26P9196 


5 


Antenna assembly 


26P9197 


6 


not available for this model 


— 


7 


Inverter card 


10L1402 



ThinkPad T20, T21 , T22 and T23 series 1 59 



Parts list 

Keyboard 



Language 


P/N (NMB) 


P/N 
(ALPS) 


Arabic 


02K5750* 


— 


Belgian 


02K5745* 


— 


Chinese, traditional 


02K5747* 


02K5718* 


Czech 


02K5751* 


— 


Danish 


02K5738* 


— 


Dutch 


02K5735* 


— 


English, U.K. 


02K5731* 


— 


English, U.S. 


02K5729* 


— 


French, Canadian 


02K5732* 


— 


French, European 


02K5734* 


— 


German 


02K5733* 


— 


Greek 


02K5753* 


— 


Hungarian 


02K5752* 


— 


Hebrew 


02K5749* 


— 


Italian 


02K5739* 


— 


Japanese 


02K5730* 


02K5701* 


Korean 


02K5744* 


02K5715* 


Norwegian 


02K5737* 


— 


Polish 


02K5755* 


— 


Portuguese 


02K5742* 


— 


Russian 


02K5748* 


— 


Slovak 


02K5754* 


— 


Slovenian 


02K5756* 


— 


Spanish, European 


02K5740* 


— 


Spanish, Latin American 


02K5743* 


— 


Swedish or Finnish 


02K5736* 


— 


Swiss 


02K5741* 


— 


Thai 


02K5757* 


02K5728* 


Turkish 


02K5746* 


— 



1 60 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



Recovery CDs 

For Windows 98 (T22 series) 



Language 


P/N 


Arabic 


14P9515* 


Chinese, Simplified 


27P2112* 


Chinese, Traditional 


27P2110* 


Czech 


14P9516* 


Danish 


23P9240* 


Dutch 


23P9247* 


English, U.K. 


23P9236* 


English, U.S. 


23P9235* 


Finnish 


23P9246* 


French, Canadian 


23P9237* 


French, European 


23P9241* 


German 


23P9242* 


Greek 


23P9266* 


Hebrew 


14P9517* 


Hungarian 


23P9267* 


Italian 


23P9245* 


Japanese 


46P4398* 


Norwegian 


23P9248* 


Polish 


23P9264* 


Portuguese 


23P9239* 


Russian 


23P9268* 


Slovak 


23P9270* 


Slovenian 


23P9269* 


Spanish, European 


23P9243* 


Spanish, Latin American 


23P9238* 


Swedish 


23P9244* 


Thai 


14P9519* 


Turkish 


14P9518* 



ThinkPad T20, T21 , T22 and T23 series 1 61 



Parts list 

For Windows 2000 (T22 series) 



Language 


P/N 


Arabic 


14P9525* 


Czech 


14P9526* 


Greek 


23P9218* 


Hebrew 


14P9527* 


Hungarian 


23P9219* 


Polish 


14P9528* 


Russian 


23P9220* 


Slovak 


23P9222* 


Slovenian 


23P9221* 


Turkish 


14P9529* 


For Windows 2000/Windows NT (T22 series) 


Language 


P/N 


Chinese, Simplified 


27P2117* 


Chinese, Traditional 


27P2114* 


Danish 


23P9180* 


Dutch 


23P9187* 


English, U.K. 


23P9176* 


English, U.S. 


23P9175* 


French, Canadian 


23P9177* 


French, European 


23P9181* 


Finnish 


23P9186* 


German 


23P9182* 


Italian 


23P9185* 


Japanese 


27P1659* 


Norwegian 


23P9188* 


Portuguese 


23P9179* 


Spanish, European 


23P9183* 


Spanish, Latin American 


23P9178* 


Swedish 


23P9184* 



1 62 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



For Windows 98 (T23 series) 



Language 


P/N 


Arabic 


14P9202* 


Arabic (modem enabled) 


14P9201* 


Chinese, Simplified 


46P4518* 


Chinese, Traditional 


46P4514* 


Chinese, Traditional (Hong Kong S.A.R.) 


46P6327* 


Czech 


14P9203* 


Danish 


14P9192* 


Dutch 


14P9199* 


English, U.K. 


14P9188* 


English, U.S. 


32P5573* 


Finnish 


14P9198* 


French, Canadian 


14P9189* 


French, European 


14P9193* 


German 


14P9194* 


Greek 


32P5653* 


Hebrew 


14P9204* 


Hungarian 


14P9208* 


Italian 


14P9197* 


Japanese 


46P4419* 


Norwegian 


14P9200* 


Polish 


14P9205* 


Portuguese 


14P9191* 


Russian 


14P9209* 


Slovak 


14P9211* 


Slovenian 


14P9210* 


Spanish, European 


14P9195* 


Spanish, Latin American 


14P9190* 


Swedish 


14P9196* 


Thai 


14P9212* 


Turkish 


14P9206* 



ThinkPad T20, T21 , T22 and T23 series 1 63 



Parts list 

For Windows 2000 (T23 series) 



Language 


P/N 


Arabic 


32P6633* 


Chinese, Simplified 


46P4520* 


Chinese, Traditional 


46P4516* 


Chinese, Traditional (Hong Kong S.A.R.) 


46P6329* 


Czech 


32P6634* 


Danish 


32P6624* 


Dutch 


32P6631* 


English, U.K. 


32P6620* 


English, U.S. 


32P6619* 


Finnish 


32P6630* 


French, Canadian 


32P6621* 


French, European 


32P6625* 


German 


32P6626* 


Greek 


32P6638* 


Hebrew 


32P6635* 


Hungarian 


32P6639* 


Italian 


32P6629* 


Norwegian 


32P6632* 


Polish 


32P6636* 


Portuguese 


32P6623* 


Russian 


32P6640* 


Spanish, European 


32P6627* 


Spanish, Latin American 


32P6622* 


Swedish 


32P6628* 


Turkish 


32P6637* 



1 64 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 

For Windows 2000/Windows NT (T23 series) 



Language 


P/N 


Danish 


14P9291* 


Dutch 


14P9298* 


English, U.K. 


32P5645* 


English, U.S. 


32P5576* 


French, Canadian 


14P9288* 


French, European 


14P9292* 


Finnish 


14P9297* 


German 


14P9293* 


Italian 


14P9296* 


Japanese 


46P4421 * 


Norwegian 


32P5742* 


Portuguese 


14P9290* 


Spanish, European 


14P9294* 


Spanish, Latin American 


14P9289* 


Swedish 


14P9295* 



ThinkPad T20, T21 , T22 and T23 series 1 65 



Parts list 

For Windows XP (T23 series) 



Language 


P/N 


Arabic 


32P6736* 


Chinese, Simplified 


46L6288* 


Chinese, Traditional 


46L6287* 


Chinese, Traditional (Hong Kong S.A.R.) 


46P6362* 


Czech 


32P6737* 


Danish 


32P6727* 


Dutch 


32P6734* 


English, U.K. 


32P6723* 


English, U.S. 


32P6722* 


Finnish 


32P6733* 


French, Canadian 


32P6724* 


French, European 


32P6728* 


German 


32P6729* 


Greek 


32P6741* 


Hebrew 


32P6738* 


Hungarian 


32P6742* 


Italian 


32P3732* 


Japanese 


46P4457* 


Norwegian 


32P6735* 


Polish 


32P6739* 


Portuguese 


32P6726* 


Russian 


32P6743* 


Spanish, European 


32P6730* 


Spanish, Latin American 


32P6725* 


Swedish 


32P6731* 


Turkish 


32P6740* 



1 66 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



Miscellaneous parts 

Italicized letters in parentheses are reference to the 
exploded view on page 147 and 152. 



FRU 


P/N 


Screw kit (including nylon-coated screws) for T20, 
T21 , T22 and T23 series: 

• M2.5 x 14 mm, bind head (15) 

• M2.5 x 1 1 .5 mm, flat head (5) 

• M2.5 x 4.8 mm, flat head (20) 

• M2.5 x 3.5 mm, flat head (10) 

• M2.0 x 13.5 mm, pan head (15) 

• M2..0 x 4.0 mm, small head (10) 

• Hexstud D-sub (10) 

• Coin screw (1) 

• Security screw (1) 

• Blank cap, enhanced port (5) 

• Screw caps, rear (5) 

• Screw caps (5) 

• Screw caps (painted) (1 0) 

• Screw caps (not painted, thin) (10) 

• Screw caps (not painted) (5) 


26P9654 


Base miscellaneous parts for T20, T21 , T22 and T23 
series: 

• Cover, RF ID 

• Spring, battery lock 

• Lid, docking FR 

• Lid, docking RR 

• Spring, lid docking 

• Spring, lid PC card 

• Lid, PC card 

• ESD plate, audio 

• Insulator for base cover 

• Eject lever 

• Spring lever 

• Puller bay 

• Label danger, backup battery 

• Rubber foot, low height (2) 

• Rubber foot, high (1 ) 

• Sponge 

• Knob, battery lock 

• Latch, battery lock 

• Screw caps 

• Screw caps, rear 


26P9285 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 67 



Parts list 



FRU 


P/N 


System miscellaneous parts for T20 series: 

• (a) Hinge cover assembly 

• (23) Easy button cover 

• (;) I/O card spacer 

• (h) Cable RJ11 to system board docking 

• (/) Holder, backup battery 

• (g) Ultrabay 2000 guide rail 

• (/) Hard-disk bay guide rail 

• (i>) Insulator, keyboard CRU 

• Mini PCI guide 

• Screw caps 

• Screw caps, rear 

Note: 12P4226 does not contain c, d, e, f and k. 


12P4226 


System miscellaneous parts for T21 series: 

• (a) Hinge cover assembly 

• (23) Easy button cover 

• (;) I/O card spacer 

• (h) Cable RJ11 to system board docking 

• (J) Holder, backup battery 

• (g) Ultrabay 2000 guide rail 

• (1) Hard-disk bay guide rail 

• (i>) Insulator, keyboard CRU 

• (c) ESD fan cover 

• (d) ESD plate spring CSB 

• (e) ESD bracket, FPC 

• (r) Keyboard support 

• (24) Bracket, LCD FRC 

• Mini PCI guide 

• Grease 

• Screw caps 

• Screw caps, rear 

Note: 12P4227 does not contain k. 


12P4227 


System miscellaneous parts for T22 series: 

• (a) Hinge cover assembly 

• (23) Easy button cover 

• (;) I/O card spacer 

• (h) Cable RJ11 to system board docking 

• (/) Holder, backup battery 

• (g) Ultrabay 2000 guide rail 

• (/) Hard-disk bay guide rail 

• (i>) Insulator, keyboard CRU 

• (c)ESD fan cover 

• (d) ESD plate spring CSB 

• (e) ESD bracket, FPC 

• (/) Keyboard support 

• (24) ESD bracket, LCD FPC 

• (k) Speaker RF bracket 

• Mini PCI guide 

• Grease 

• Screw caps 

• Screw caps, rear 


12P4228 



(continued) 



1 68 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



FRU 


P/N 


System miscellaneous parts for T23 series: 

• (a) Hinge cover assembly 

• (23) Easy button cover T23 

• (g) I/O card spacer 

• (/) Cable RJ11 to system board docking 

• (h) Holder, backup battery 

• (e) Ultrabay 2000 guide rail 

• (J) Hard-disk bay guide rail 

• (£>) Insulator, keyboard CRU 

• (k) ESD bracket, FPC 

• (d) ESD bracket, LCD FPC 

• (c) EMI finger PCMCIA 

• (;) Bracket EMI speaker 

• Mini PCI guide 

• Thermal grease 

• Screw caps 

• Screw caps, rear 


12P4229 


I/O card miscellaneous parts for for T20, T21 and 
T22 series: 

• DC jack connector 

• Cable RJ11/45 to mini PCI 

• Insulator, modular jack 

• Insulation tape 

• Screw caps 

• Screw caps, rear 


08K6683 


I/O card miscellaneous part for T23 series: 

• DC jack connector 

• Cable RJ11/45 to Mini PCI/EDC 

• Insulator, modular jack 

• Insulator for system board 

• Insulation tape 

• Screw caps 

• Screw caps, rear 


26P9789 


System board miscellaneous parts for T20, T21 and 
T22 series: 

• System board stud 

• Insulator, PC card 

• Insulator, battery latch 

• Keyboard connector guide 
■ Shock rubber 

• Insulator, docking connector 

• Insulator, fan connector 

• Insulator, Ultrabay 2000 connector 

• Insulator, I/O connector 

• Shield, Mini PCI 

• Insulator, hard-disk drive 

• Thermal grease 

• Screw caps 

• Screw caps, rear 


08K7099 



(continued) 



ThinkPad T20, T21 , T22 and T23 series 1 69 



Parts list 



FRU 

System board miscellaneous parts for T23 series: 

• System board stud 

• System board stud (long) 

• System board stud (back) 

• Insulator, PC card 

• Insulator, battery latch 

• Keyboard connector guide 
■ Shock rubber 

• Insulator, docking connector 

• Insulator, Ultrabay 2000 bay connector 

• Insulator, I/O connector 

• Insulator, hard-disk drive 

• Shield, Mini PCI 

• Insulator, guide rail 

• Thermal grease 

• Screw caps 

• Screw caps, rear 



P/N 

26P9164 



Optional FRUs 



FRU 


P/N 


256-MB SDRAM SO DIMM (PC100) 


33L3070* 


64-MB SDRAM SO DIMM (PC133) 


19K4651* 


512-MB SDRAM SO DIMM (PC133) 


19K4657* 


Ultrabay 2000 diskette drive (TEAC) 


08K9606* 


Ultrabay 2000 diskette drive (SONY) 


08K9607* 


Ultrabay 2000 CD-ROM drive (24x) (LG) 


27L4141* 


Ultrabay 2000 CD-ROM drive (24x) (TOSHIBA) 


27L3973* 


Ultrabay 2000 DVD-ROM drive (6x) (MKE) 


05K9188* 


Ultrabay 2000 DVD-ROM drive (6x) (TOSHIBA) 


05K9160* 


Ultrabay 2000 DVD-ROM drive (8x) (MKE) 


27L4241* 


Ultrabay 2000 DVD-ROM drive (8x) (HITACHI) 


27L4236* 


Ultrabay Plus device carrier 


26P9388* 


Ultrabay Plus numeric keypad 


19K2056* 


Ultrabay Plus cradle for WorkPad c500 series 


26P9389* 



(continued) 



1 70 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



FRU 


P/N 


Ultrabay 2000 SuperDisk drive (LS120) 


05K9235* 


Ultrabay 2000 SuperDisk drive (LS120 2x) 


27L3450* 


Ultrabay 2000 SuperDisk drive (LS240) 


08K9615* 


Ultrabay 2000 ZIP-250 drive 


00N8254* 


Ultrabay 2000 battery 


02K6645* 


Ultrabay 2000 2nd HDD adapter 


08K6067* 


Hard-disk drive (6.0 GB), STD 


05K9227* 


Hard-disk drive (6.0 GB), HITACHI 


05K9228* 


Hard-disk drive (10.0 GB), STD 


08K9508* 


Hard-disk drive (12.0 GB), STD 


05K9229* 


Hard-disk drive (12.0 GB), HITACHI 


05K9230* 


Hard-disk drive (18.0 GB), STD 


27L4073* 


Hard-disk drive (20.0 GB), STD 


27L4286* 


Hard-disk drive (32.0 GB), STD 


08K9509* 


Hard-disk drive (40.0 GB), STD 


08K9683* 


Hard-disk drive (48.0 GB), STD 


08K9599* 


Hard-disk drive (60.0 GB), STD 


08K9700* 


Mini PCI combo card (Intel) 


08K9509* 


Battery pack (Li-Ion) 9 cell, Panasonic 


02K6615* 


Battery pack (Li-Ion) 9 cell, SANYO 


02K6619* 


Multiple battery charger 


02K6642* 


Multiple battery charger (Ni-HM) 


02K6718* 


AC adapter (72 W), 3-pin (ASTEC) 


02K6666* 


AC adapter (72 W), 2-pin (ASTEC) 


02K6669* 


Asset ID RF adapter 


08K6065* 


ThinkPad Dock 


08N1546* 


PCI cover 


05K6246* 


ThinkPad Dock with extension plate 


08N1537* 


PCI cover with foot 


08K7317* 


Top cover and screw kit for ThinkPad Dock 


12P4143* 


ThinkPad Port Replicator 


08N1536* 


Diskette drive cable 


27L0525* 


Conversion adapter for diskette drive cable 


08K6360* 


Video cable 


27L0531* 


Telephone cable 


05K2707* 



ThinkPad T20, T21 , T22 and T23 series 1 71 



Parts list 

Common parts list 
Tools 



Triconnector wrap plug 


72X8546 


PC test card 


35G4703 


Audio wrap cable 


66G5180 


USB parallel test cable 


05K2580 


Screwdriver kit 


95F3598 


Torque screwdriver 


05K4695 


5 mm socket wrench 


05K4694 


Screwdriver 


27L8126 


ThinkPad hardware maintenance diskette version 

1.62 

Note: Download the file from the following Web site: 

http : //www. i bm. com/pc/ partner/ i nfoti ps 





Power cords (system) 

IBM power cords for a specific country or region are 
usually available only in that country or region: 

For 2-pin power cords: 



Region 


P/N 


Canada, U.S. 


13H5264* 


Japan 


13H5273* 


Argentina 


36L8870* 


For 3-pin power cords: 


Region 


P/N 


Australia, New Zealand 


76H3514* 


Taiwan, Thailand 


76H3516* 


Italy 


76H3530* 


Denmark 


76H3520* 


U.K., China (Hong Kong S.A.R.) 


76H3524* 


European countries 


76H3518* 


India, South Africa 


76H3522* 


Israel 


76H3532* 


Korea 


76H3535* 


China (P.R.C.) (other than Hong Kong S.A.R.) 


02K0539* 


Switzerland 


76H3528* 



1 72 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Parts list 



Power cords (docking station) 

IBM power cords for a specific country or region are 
usually available only in that country or region: 

For 3-pin power cords: 



Region 


P/N 


Argentina 


36L8868* 


Australia, New Zealand 


75H8988* 


Canada, Thailand, U.S. 


75H8989* 


Denmark 


75H8992* 


European countries 


75H8990* 


India, South Africa 


75H8993* 


Israel 


75H8999* 


Italy 


75H8998* 


Japan 


75H8996* 


Korea 


76H3536* 


China (P.R.C.) (other than Hong Kong S.A.R) 


02K0540* 


Switzerland 


75H8997* 


U.K. 


75H8994* 



ThinkPad T20, T21 , T22 and T23 series 1 73 



Notices 

Notices 

References in this publication to IBM products, programs, 
or services do not imply that IBM intends to make these 
available in all countries in which IBM operates. Any 
reference to an IBM product, program, or service is not 
intended to state or imply that only that IBM product, 
program, or service may be used. Any functionally 
equivalent product, program, or service that does not 
infringe any of the intellectual property rights of IBM may 
be used instead of the IBM product, program, or service. 
The evaluation and verification of operation in conjunction 
with other products, except those expressly designated by 
IBM, are the responsibility of the user. 

IBM may have patents or pending patent applications 
covering subject matter in this document. The furnishing of 
this document does not give you any license to these 
patents. You can send license inquiries, in writing, to the 
IBM Director of Licensing, IBM Corporation, 500 Columbus 
Avenue, Thomwood, NY 10594, U.S.A. 

Trademarks 

The following terms are trademarks of the IBM Corporation 
in the United States or other countries or both: 

Asset ID 

IBM 

OS/2 

ThinkLight 

ThinkPad 

TrackPoint 

Ultrabay 

UltraPort 

Microsoft, Windows, Windows NT, and the Windows logo 
are trademarks of Microsoft Corporation in the United 
States and/or other countries. 

Pentium is trademark of Intel Corporation in the United 
States and/or other countries. (For a complete list of Intel 
trademarks, see the legal information on 
http://www.inte! .com/) 

Other company, product, or service names may be the 
trademarks or service marks of others. 



1 74 ThinkPad T20, T21 , T22, T23 (MT 2647/2648) 



Notices 



ThinkPad T20, T21 , T22 and T23 series 1 75 



Part Number: 62P9631 



(IP) P/N: 62P9631